diff --git a/synapse/handlers/auth.py b/synapse/handlers/auth.py
index d5d207243..2e138f328 100644
--- a/synapse/handlers/auth.py
+++ b/synapse/handlers/auth.py
@@ -77,6 +77,7 @@ class AuthHandler(BaseHandler):
                 self.ldap_bind_password = hs.config.ldap_bind_password
 
         self.hs = hs  # FIXME better possibility to access registrationHandler later?
+        self.device_handler = hs.get_device_handler()
 
     @defer.inlineCallbacks
     def check_auth(self, flows, clientdict, clientip):
@@ -374,7 +375,8 @@ class AuthHandler(BaseHandler):
         return self._check_password(user_id, password)
 
     @defer.inlineCallbacks
-    def get_login_tuple_for_user_id(self, user_id, device_id=None):
+    def get_login_tuple_for_user_id(self, user_id, device_id=None,
+                                    initial_display_name=None):
         """
         Gets login tuple for the user with the given user ID.
 
@@ -383,9 +385,15 @@ class AuthHandler(BaseHandler):
         The user is assumed to have been authenticated by some other
         machanism (e.g. CAS), and the user_id converted to the canonical case.
 
+        The device will be recorded in the table if it is not there already.
+
         Args:
             user_id (str): canonical User ID
-            device_id (str): the device ID to associate with the access token
+            device_id (str|None): the device ID to associate with the tokens.
+               None to leave the tokens unassociated with a device (deprecated:
+               we should always have a device ID)
+            initial_display_name (str): display name to associate with the
+               device if it needs re-registering
         Returns:
             A tuple of:
               The access token for the user's session.
@@ -397,6 +405,16 @@ class AuthHandler(BaseHandler):
         logger.info("Logging in user %s on device %s", user_id, device_id)
         access_token = yield self.issue_access_token(user_id, device_id)
         refresh_token = yield self.issue_refresh_token(user_id, device_id)
+
+        # the device *should* have been registered before we got here; however,
+        # it's possible we raced against a DELETE operation. The thing we
+        # really don't want is active access_tokens without a record of the
+        # device, so we double-check it here.
+        if device_id is not None:
+            yield self.device_handler.check_device_registered(
+                user_id, device_id, initial_display_name
+            )
+
         defer.returnValue((access_token, refresh_token))
 
     @defer.inlineCallbacks
diff --git a/synapse/handlers/device.py b/synapse/handlers/device.py
index 1f9e15c33..9e65d85e6 100644
--- a/synapse/handlers/device.py
+++ b/synapse/handlers/device.py
@@ -100,7 +100,7 @@ class DeviceHandler(BaseHandler):
 
         Args:
             user_id (str):
-            device_id (str)
+            device_id (str):
 
         Returns:
             defer.Deferred: dict[str, X]: info on the device
@@ -117,6 +117,55 @@ class DeviceHandler(BaseHandler):
         _update_device_from_client_ips(device, ips)
         defer.returnValue(device)
 
+    @defer.inlineCallbacks
+    def delete_device(self, user_id, device_id):
+        """ Delete the given device
+
+        Args:
+            user_id (str):
+            device_id (str):
+
+        Returns:
+            defer.Deferred:
+        """
+
+        try:
+            yield self.store.delete_device(user_id, device_id)
+        except errors.StoreError, e:
+            if e.code == 404:
+                # no match
+                pass
+            else:
+                raise
+
+        yield self.store.user_delete_access_tokens(user_id,
+                                                   device_id=device_id)
+
+    @defer.inlineCallbacks
+    def update_device(self, user_id, device_id, content):
+        """ Update the given device
+
+        Args:
+            user_id (str):
+            device_id (str):
+            content (dict): body of update request
+
+        Returns:
+            defer.Deferred:
+        """
+
+        try:
+            yield self.store.update_device(
+                user_id,
+                device_id,
+                new_display_name=content.get("display_name")
+            )
+        except errors.StoreError, e:
+            if e.code == 404:
+                raise errors.NotFoundError()
+            else:
+                raise
+
 
 def _update_device_from_client_ips(device, client_ips):
     ip = client_ips.get((device["user_id"], device["device_id"]), {})
diff --git a/synapse/http/server.py b/synapse/http/server.py
index f705abab9..2b3c05a74 100644
--- a/synapse/http/server.py
+++ b/synapse/http/server.py
@@ -205,6 +205,7 @@ class JsonResource(HttpServer, resource.Resource):
 
     def register_paths(self, method, path_patterns, callback):
         for path_pattern in path_patterns:
+            logger.debug("Registering for %s %s", method, path_pattern.pattern)
             self.path_regexs.setdefault(method, []).append(
                 self._PathEntry(path_pattern, callback)
             )
diff --git a/synapse/rest/client/v1/login.py b/synapse/rest/client/v1/login.py
index e8b791519..92fcae674 100644
--- a/synapse/rest/client/v1/login.py
+++ b/synapse/rest/client/v1/login.py
@@ -152,7 +152,10 @@ class LoginRestServlet(ClientV1RestServlet):
         )
         device_id = yield self._register_device(user_id, login_submission)
         access_token, refresh_token = (
-            yield auth_handler.get_login_tuple_for_user_id(user_id, device_id)
+            yield auth_handler.get_login_tuple_for_user_id(
+                user_id, device_id,
+                login_submission.get("initial_device_display_name")
+            )
         )
         result = {
             "user_id": user_id,  # may have changed
@@ -173,7 +176,10 @@ class LoginRestServlet(ClientV1RestServlet):
         )
         device_id = yield self._register_device(user_id, login_submission)
         access_token, refresh_token = (
-            yield auth_handler.get_login_tuple_for_user_id(user_id, device_id)
+            yield auth_handler.get_login_tuple_for_user_id(
+                user_id, device_id,
+                login_submission.get("initial_device_display_name")
+            )
         )
         result = {
             "user_id": user_id,  # may have changed
@@ -262,7 +268,8 @@ class LoginRestServlet(ClientV1RestServlet):
             )
             access_token, refresh_token = (
                 yield auth_handler.get_login_tuple_for_user_id(
-                    registered_user_id, device_id
+                    registered_user_id, device_id,
+                    login_submission.get("initial_device_display_name")
                 )
             )
             result = {
diff --git a/synapse/rest/client/v2_alpha/devices.py b/synapse/rest/client/v2_alpha/devices.py
index 8b9ab4f67..8fbd3d3df 100644
--- a/synapse/rest/client/v2_alpha/devices.py
+++ b/synapse/rest/client/v2_alpha/devices.py
@@ -13,19 +13,17 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from twisted.internet import defer
-
-from synapse.http.servlet import RestServlet
-
-from ._base import client_v2_patterns
-
 import logging
 
+from twisted.internet import defer
+
+from synapse.http import servlet
+from ._base import client_v2_patterns
 
 logger = logging.getLogger(__name__)
 
 
-class DevicesRestServlet(RestServlet):
+class DevicesRestServlet(servlet.RestServlet):
     PATTERNS = client_v2_patterns("/devices$", releases=[], v2_alpha=False)
 
     def __init__(self, hs):
@@ -47,7 +45,7 @@ class DevicesRestServlet(RestServlet):
         defer.returnValue((200, {"devices": devices}))
 
 
-class DeviceRestServlet(RestServlet):
+class DeviceRestServlet(servlet.RestServlet):
     PATTERNS = client_v2_patterns("/devices/(?P<device_id>[^/]*)$",
                                   releases=[], v2_alpha=False)
 
@@ -70,6 +68,32 @@ class DeviceRestServlet(RestServlet):
         )
         defer.returnValue((200, device))
 
+    @defer.inlineCallbacks
+    def on_DELETE(self, request, device_id):
+        # XXX: it's not completely obvious we want to expose this endpoint.
+        # It allows the client to delete access tokens, which feels like a
+        # thing which merits extra auth. But if we want to do the interactive-
+        # auth dance, we should really make it possible to delete more than one
+        # device at a time.
+        requester = yield self.auth.get_user_by_req(request)
+        yield self.device_handler.delete_device(
+            requester.user.to_string(),
+            device_id,
+        )
+        defer.returnValue((200, {}))
+
+    @defer.inlineCallbacks
+    def on_PUT(self, request, device_id):
+        requester = yield self.auth.get_user_by_req(request)
+
+        body = servlet.parse_json_object_from_request(request)
+        yield self.device_handler.update_device(
+            requester.user.to_string(),
+            device_id,
+            body
+        )
+        defer.returnValue((200, {}))
+
 
 def register_servlets(hs, http_server):
     DevicesRestServlet(hs).register(http_server)
diff --git a/synapse/rest/client/v2_alpha/register.py b/synapse/rest/client/v2_alpha/register.py
index c8c9395fc..9f599ea8b 100644
--- a/synapse/rest/client/v2_alpha/register.py
+++ b/synapse/rest/client/v2_alpha/register.py
@@ -374,13 +374,13 @@ class RegisterRestServlet(RestServlet):
         """
         device_id = yield self._register_device(user_id, params)
 
-        access_token = yield self.auth_handler.issue_access_token(
-            user_id, device_id=device_id
+        access_token, refresh_token = (
+            yield self.auth_handler.get_login_tuple_for_user_id(
+                user_id, device_id=device_id,
+                initial_display_name=params.get("initial_device_display_name")
+            )
         )
 
-        refresh_token = yield self.auth_handler.issue_refresh_token(
-            user_id, device_id=device_id
-        )
         defer.returnValue({
             "user_id": user_id,
             "access_token": access_token,
diff --git a/synapse/storage/devices.py b/synapse/storage/devices.py
index 1cc6e07f2..afd6530ca 100644
--- a/synapse/storage/devices.py
+++ b/synapse/storage/devices.py
@@ -76,6 +76,46 @@ class DeviceStore(SQLBaseStore):
             desc="get_device",
         )
 
+    def delete_device(self, user_id, device_id):
+        """Delete a device.
+
+        Args:
+            user_id (str): The ID of the user which owns the device
+            device_id (str): The ID of the device to delete
+        Returns:
+            defer.Deferred
+        """
+        return self._simple_delete_one(
+            table="devices",
+            keyvalues={"user_id": user_id, "device_id": device_id},
+            desc="delete_device",
+        )
+
+    def update_device(self, user_id, device_id, new_display_name=None):
+        """Update a device.
+
+        Args:
+            user_id (str): The ID of the user which owns the device
+            device_id (str): The ID of the device to update
+            new_display_name (str|None): new displayname for device; None
+               to leave unchanged
+        Raises:
+            StoreError: if the device is not found
+        Returns:
+            defer.Deferred
+        """
+        updates = {}
+        if new_display_name is not None:
+            updates["display_name"] = new_display_name
+        if not updates:
+            return defer.succeed(None)
+        return self._simple_update_one(
+            table="devices",
+            keyvalues={"user_id": user_id, "device_id": device_id},
+            updatevalues=updates,
+            desc="update_device",
+        )
+
     @defer.inlineCallbacks
     def get_devices_by_user(self, user_id):
         """Retrieve all of a user's registered devices.
diff --git a/synapse/storage/registration.py b/synapse/storage/registration.py
index 9a92b3536..935e82bf7 100644
--- a/synapse/storage/registration.py
+++ b/synapse/storage/registration.py
@@ -18,18 +18,31 @@ import re
 from twisted.internet import defer
 
 from synapse.api.errors import StoreError, Codes
-
-from ._base import SQLBaseStore
+from synapse.storage import background_updates
 from synapse.util.caches.descriptors import cached, cachedInlineCallbacks
 
 
-class RegistrationStore(SQLBaseStore):
+class RegistrationStore(background_updates.BackgroundUpdateStore):
 
     def __init__(self, hs):
         super(RegistrationStore, self).__init__(hs)
 
         self.clock = hs.get_clock()
 
+        self.register_background_index_update(
+            "access_tokens_device_index",
+            index_name="access_tokens_device_id",
+            table="access_tokens",
+            columns=["user_id", "device_id"],
+        )
+
+        self.register_background_index_update(
+            "refresh_tokens_device_index",
+            index_name="refresh_tokens_device_id",
+            table="refresh_tokens",
+            columns=["user_id", "device_id"],
+        )
+
     @defer.inlineCallbacks
     def add_access_token_to_user(self, user_id, token, device_id=None):
         """Adds an access token for the given user.
@@ -238,11 +251,16 @@ class RegistrationStore(SQLBaseStore):
         self.get_user_by_id.invalidate((user_id,))
 
     @defer.inlineCallbacks
-    def user_delete_access_tokens(self, user_id, except_token_ids=[]):
+    def user_delete_access_tokens(self, user_id, except_token_ids=[],
+                                  device_id=None):
         def f(txn):
             sql = "SELECT token FROM access_tokens WHERE user_id = ?"
             clauses = [user_id]
 
+            if device_id is not None:
+                sql += " AND device_id = ?"
+                clauses.append(device_id)
+
             if except_token_ids:
                 sql += " AND id NOT IN (%s)" % (
                     ",".join(["?" for _ in except_token_ids]),
diff --git a/synapse/storage/schema/delta/33/access_tokens_device_index.sql b/synapse/storage/schema/delta/33/access_tokens_device_index.sql
new file mode 100644
index 000000000..61ad3fe3e
--- /dev/null
+++ b/synapse/storage/schema/delta/33/access_tokens_device_index.sql
@@ -0,0 +1,17 @@
+/* Copyright 2016 OpenMarket Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+INSERT INTO background_updates (update_name, progress_json) VALUES
+  ('access_tokens_device_index', '{}');
diff --git a/synapse/storage/schema/delta/33/refreshtoken_device_index.sql b/synapse/storage/schema/delta/33/refreshtoken_device_index.sql
new file mode 100644
index 000000000..bb225dafb
--- /dev/null
+++ b/synapse/storage/schema/delta/33/refreshtoken_device_index.sql
@@ -0,0 +1,17 @@
+/* Copyright 2016 OpenMarket Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+INSERT INTO background_updates (update_name, progress_json) VALUES
+  ('refresh_tokens_device_index', '{}');
diff --git a/tests/handlers/test_device.py b/tests/handlers/test_device.py
index 331aa13fe..85a970a6c 100644
--- a/tests/handlers/test_device.py
+++ b/tests/handlers/test_device.py
@@ -12,11 +12,14 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-from synapse import types
+
 from twisted.internet import defer
 
+import synapse.api.errors
 import synapse.handlers.device
+
 import synapse.storage
+from synapse import types
 from tests import unittest, utils
 
 user1 = "@boris:aaa"
@@ -27,7 +30,7 @@ class DeviceTestCase(unittest.TestCase):
     def __init__(self, *args, **kwargs):
         super(DeviceTestCase, self).__init__(*args, **kwargs)
         self.store = None    # type: synapse.storage.DataStore
-        self.handler = None  # type: device.DeviceHandler
+        self.handler = None  # type: synapse.handlers.device.DeviceHandler
         self.clock = None    # type: utils.MockClock
 
     @defer.inlineCallbacks
@@ -123,6 +126,37 @@ class DeviceTestCase(unittest.TestCase):
             "last_seen_ts": 3000000,
         }, res)
 
+    @defer.inlineCallbacks
+    def test_delete_device(self):
+        yield self._record_users()
+
+        # delete the device
+        yield self.handler.delete_device(user1, "abc")
+
+        # check the device was deleted
+        with self.assertRaises(synapse.api.errors.NotFoundError):
+            yield self.handler.get_device(user1, "abc")
+
+        # we'd like to check the access token was invalidated, but that's a
+        # bit of a PITA.
+
+    @defer.inlineCallbacks
+    def test_update_device(self):
+        yield self._record_users()
+
+        update = {"display_name": "new display"}
+        yield self.handler.update_device(user1, "abc", update)
+
+        res = yield self.handler.get_device(user1, "abc")
+        self.assertEqual(res["display_name"], "new display")
+
+    @defer.inlineCallbacks
+    def test_update_unknown_device(self):
+        update = {"display_name": "new_display"}
+        with self.assertRaises(synapse.api.errors.NotFoundError):
+            yield self.handler.update_device("user_id", "unknown_device_id",
+                                             update)
+
     @defer.inlineCallbacks
     def _record_users(self):
         # check this works for both devices which have a recorded client_ip,
diff --git a/tests/rest/client/v2_alpha/test_register.py b/tests/rest/client/v2_alpha/test_register.py
index 3bd7065e3..8ac56a1fb 100644
--- a/tests/rest/client/v2_alpha/test_register.py
+++ b/tests/rest/client/v2_alpha/test_register.py
@@ -65,13 +65,16 @@ class RegisterRestServletTestCase(unittest.TestCase):
         self.registration_handler.appservice_register = Mock(
             return_value=user_id
         )
-        self.auth_handler.issue_access_token = Mock(return_value=token)
+        self.auth_handler.get_login_tuple_for_user_id = Mock(
+            return_value=(token, "kermits_refresh_token")
+        )
 
         (code, result) = yield self.servlet.on_POST(self.request)
         self.assertEquals(code, 200)
         det_data = {
             "user_id": user_id,
             "access_token": token,
+            "refresh_token": "kermits_refresh_token",
             "home_server": self.hs.hostname
         }
         self.assertDictContainsSubset(det_data, result)
@@ -121,7 +124,9 @@ class RegisterRestServletTestCase(unittest.TestCase):
             "password": "monkey"
         }, None)
         self.registration_handler.register = Mock(return_value=(user_id, None))
-        self.auth_handler.issue_access_token = Mock(return_value=token)
+        self.auth_handler.get_login_tuple_for_user_id = Mock(
+            return_value=(token, "kermits_refresh_token")
+        )
         self.device_handler.check_device_registered = \
             Mock(return_value=device_id)
 
@@ -130,13 +135,14 @@ class RegisterRestServletTestCase(unittest.TestCase):
         det_data = {
             "user_id": user_id,
             "access_token": token,
+            "refresh_token": "kermits_refresh_token",
             "home_server": self.hs.hostname,
             "device_id": device_id,
         }
         self.assertDictContainsSubset(det_data, result)
         self.assertIn("refresh_token", result)
-        self.auth_handler.issue_access_token.assert_called_once_with(
-            user_id, device_id=device_id)
+        self.auth_handler.get_login_tuple_for_user_id(
+            user_id, device_id=device_id, initial_device_display_name=None)
 
     def test_POST_disabled_registration(self):
         self.hs.config.enable_registration = False
diff --git a/tests/storage/test_devices.py b/tests/storage/test_devices.py
index a6ce99337..f8725acea 100644
--- a/tests/storage/test_devices.py
+++ b/tests/storage/test_devices.py
@@ -15,6 +15,7 @@
 
 from twisted.internet import defer
 
+import synapse.api.errors
 import tests.unittest
 import tests.utils
 
@@ -67,3 +68,38 @@ class DeviceStoreTestCase(tests.unittest.TestCase):
             "device_id": "device2",
             "display_name": "display_name 2",
         }, res["device2"])
+
+    @defer.inlineCallbacks
+    def test_update_device(self):
+        yield self.store.store_device(
+            "user_id", "device_id", "display_name 1"
+        )
+
+        res = yield self.store.get_device("user_id", "device_id")
+        self.assertEqual("display_name 1", res["display_name"])
+
+        # do a no-op first
+        yield self.store.update_device(
+            "user_id", "device_id",
+        )
+        res = yield self.store.get_device("user_id", "device_id")
+        self.assertEqual("display_name 1", res["display_name"])
+
+        # do the update
+        yield self.store.update_device(
+            "user_id", "device_id",
+            new_display_name="display_name 2",
+        )
+
+        # check it worked
+        res = yield self.store.get_device("user_id", "device_id")
+        self.assertEqual("display_name 2", res["display_name"])
+
+    @defer.inlineCallbacks
+    def test_update_unknown_device(self):
+        with self.assertRaises(synapse.api.errors.StoreError) as cm:
+            yield self.store.update_device(
+                "user_id", "unknown_device_id",
+                new_display_name="display_name 2",
+            )
+        self.assertEqual(404, cm.exception.code)