diff --git a/app/src/main/java/com/geeksville/mesh/service/MockInterface.kt b/app/src/main/java/com/geeksville/mesh/service/MockInterface.kt
index 84d3aab53..c83b0b00d 100644
--- a/app/src/main/java/com/geeksville/mesh/service/MockInterface.kt
+++ b/app/src/main/java/com/geeksville/mesh/service/MockInterface.kt
@@ -26,13 +26,40 @@ class MockInterface(private val service: RadioInterfaceService) : Logging, IRadi
     override fun handleSendToRadio(p: ByteArray) {
         val pr = MeshProtos.ToRadio.parseFrom(p)
 
+        val data = if (pr.hasPacket()) pr.packet.decoded else null
+
         when {
             pr.wantConfigId != 0 -> sendConfigResponse(pr.wantConfigId)
+            data != null && data.portnum == Portnums.PortNum.ADMIN_APP -> handleAdminPacket(
+                pr,
+                AdminProtos.AdminMessage.parseFrom(data.payload)
+            )
             pr.hasPacket() && pr.packet.wantAck -> sendFakeAck(pr)
             else -> info("Ignoring data sent to mock interface $pr")
         }
     }
 
+    private fun handleAdminPacket(pr: MeshProtos.ToRadio, d: AdminProtos.AdminMessage) {
+        if (d.getRadioRequest)
+            sendAdmin(pr.packet.to, pr.packet.from, pr.packet.id) {
+                getRadioResponse = RadioConfigProtos.RadioConfig.newBuilder().apply {
+
+                    preferences = RadioConfigProtos.RadioConfig.UserPreferences.newBuilder().apply {
+                        region = RadioConfigProtos.RegionCode.TW
+                        // FIXME set critical times?
+                    }.build()
+                }.build()
+            }
+
+        if (d.getChannelRequest != 0)
+            sendAdmin(pr.packet.to, pr.packet.from, pr.packet.id) {
+                getChannelResponse = ChannelProtos.Channel.newBuilder().apply {
+                        index = d.getChannelRequest - 1 // 0 based on the response
+                    role = if(d.getChannelRequest == 1) ChannelProtos.Channel.Role.PRIMARY else ChannelProtos.Channel.Role.DISABLED
+                    }.build()
+            }
+    }
+
     override fun close() {
         info("Closing the mock interface")
     }
@@ -53,8 +80,7 @@ class MockInterface(private val service: RadioInterfaceService) : Logging, IRadi
             }.build()
         }
 
-
-    private fun makeAck(fromIn: Int, toIn: Int, msgId: Int) =
+    private fun makeDataPacket(fromIn: Int, toIn: Int, data: MeshProtos.Data.Builder) =
         MeshProtos.FromRadio.newBuilder().apply {
             packet = MeshProtos.MeshPacket.newBuilder().apply {
                 id = messageNumSequence.next()
@@ -62,15 +88,34 @@ class MockInterface(private val service: RadioInterfaceService) : Logging, IRadi
                 to = toIn
                 rxTime = (System.currentTimeMillis() / 1000).toInt()
                 rxSnr = 1.5f
-                decoded = MeshProtos.Data.newBuilder().apply {
-                    portnum = Portnums.PortNum.ROUTING_APP
-                    payload = MeshProtos.Routing.newBuilder().apply {
-                    }.build().toByteString()
-                    requestId = msgId
-                }.build()
+                decoded = data.build()
             }.build()
         }
 
+    private fun makeAck(fromIn: Int, toIn: Int, msgId: Int) =
+        makeDataPacket(fromIn, toIn, MeshProtos.Data.newBuilder().apply {
+            portnum = Portnums.PortNum.ROUTING_APP
+            payload = MeshProtos.Routing.newBuilder().apply {
+            }.build().toByteString()
+            requestId = msgId
+        })
+
+    private fun sendAdmin(
+        fromIn: Int,
+        toIn: Int,
+        reqId: Int,
+        initFn: AdminProtos.AdminMessage.Builder.() -> Unit
+    ) {
+        val p = makeDataPacket(fromIn, toIn, MeshProtos.Data.newBuilder().apply {
+            portnum = Portnums.PortNum.ADMIN_APP
+            payload = AdminProtos.AdminMessage.newBuilder().also {
+                initFn(it)
+            }.build().toByteString()
+            requestId = reqId
+        })
+        service.handleFromRadio(p.build().toByteArray())
+    }
+
     /// Send a fake ack packet back if the sender asked for want_ack
     private fun sendFakeAck(pr: MeshProtos.ToRadio) {
         service.handleFromRadio(
diff --git a/app/src/main/java/com/geeksville/mesh/service/SimRadio.kt b/app/src/main/java/com/geeksville/mesh/service/SimRadio.kt
deleted file mode 100644
index 36b87b40d..000000000
--- a/app/src/main/java/com/geeksville/mesh/service/SimRadio.kt
+++ /dev/null
@@ -1,51 +0,0 @@
-package com.geeksville.mesh
-
-import android.content.Context
-import com.geeksville.mesh.service.RadioInterfaceService
-
-class SimRadio(private val context: Context) {
-
-    /**
-     * When simulating we parse these MeshPackets as if they arrived at startup
-     * Send broadcast them after we receive a ToRadio.WantNodes message.
-     *
-     * Our fake net has three nodes
-     *
-     * +16508675309, nodenum 9 - our node
-     * +16508675310, nodenum 10 - some other node, name Bob One/BO
-     * (eventually) +16508675311, nodenum 11 - some other node
-     */
-    private val simInitPackets =
-        arrayOf(
-            """ { "from": 10, "to": 9, "payload": { "user": { "id": "+16508675310", "longName": "Bob One", "shortName": "BO" }}}  """,
-            """ { "from": 10, "to": 9, "payload": { "data": { "payload": "aGVsbG8gd29ybGQ=", "typ": 0 }}}  """, // SIGNAL_OPAQUE
-            """ { "from": 10, "to": 9, "payload": { "data": { "payload": "aGVsbG8gd29ybGQ=", "typ": 1 }}}  """, // CLEAR_TEXT
-            """ { "from": 10, "to": 9, "payload": { "data": { "payload": "", "typ": 2 }}}  """ // CLEAR_READACK
-        )
-
-    fun start() {
-        // FIXME, do this sim startup elsewhere, because waiting for a packet from MeshService
-        // isn't right, because that service can't successfully send radio packets until it knows
-        // our node num
-        // Instead a separate sim radio thing can come in at startup and force these broadcasts to happen
-        // at the right time
-        // Send a fake my_node_num response
-        /* FIXME - change to use new radio info message
-        RadioInterfaceService.broadcastReceivedFromRadio(
-            context,
-            MeshProtos.FromRadio.newBuilder().apply {
-                myNodeNum = 9
-            }.build().toByteArray()
-        ) */
-
-        simInitPackets.forEach { _ ->
-            val fromRadio = MeshProtos.FromRadio.newBuilder().apply {
-                packet = MeshProtos.MeshPacket.newBuilder().apply {
-                    // jsonParser.merge(json, this)
-                }.build()
-            }.build()
-
-            RadioInterfaceService.broadcastReceivedFromRadio(context, fromRadio.toByteArray())
-        }
-    }
-}
\ No newline at end of file
diff --git a/app/src/main/java/com/geeksville/mesh/ui/SettingsFragment.kt b/app/src/main/java/com/geeksville/mesh/ui/SettingsFragment.kt
index ae77be60c..86c20fc2c 100644
--- a/app/src/main/java/com/geeksville/mesh/ui/SettingsFragment.kt
+++ b/app/src/main/java/com/geeksville/mesh/ui/SettingsFragment.kt
@@ -590,7 +590,7 @@ class SettingsFragment : ScreenFragment("Settings"), Logging {
         val spinner = binding.regionSpinner
         val regionAdapter = ArrayAdapter(requireContext(), android.R.layout.simple_spinner_item, regions)
         regionAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item)
-        spinner.adapter = regionAdapter
+        // spinner.adapter = regionAdapter
 
         model.ownerName.observe(viewLifecycleOwner, { name ->
             binding.usernameEditText.setText(name)
diff --git a/app/src/main/res/layout/settings_fragment.xml b/app/src/main/res/layout/settings_fragment.xml
index 80c7a6714..e34fb6518 100644
--- a/app/src/main/res/layout/settings_fragment.xml
+++ b/app/src/main/res/layout/settings_fragment.xml
@@ -62,8 +62,10 @@
             android:layout_height="wrap_content"
             android:layout_marginStart="8dp"
             android:layout_marginEnd="16dp"
+            android:theme="@style/AppTheme.Spinner"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toEndOf="@+id/usernameView"
+            android:entries="@array/regions"
             app:layout_constraintTop_toTopOf="parent" />
     </androidx.constraintlayout.widget.ConstraintLayout>
 
diff --git a/app/src/main/res/values/protobufs.xml b/app/src/main/res/values/protobufs.xml
new file mode 100644
index 000000000..190471fc4
--- /dev/null
+++ b/app/src/main/res/values/protobufs.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <array name="regions">
+        <!-- FIXME - better to get this through reflection -->
+        <item>Unset</item>
+        <item>US</item>
+        <item>EU433</item>
+        <item>EU865</item>
+        <item>CN</item>
+        <item>JP</item>
+        <item>ANZ</item>
+        <item>KR</item>
+        <item>TW</item>
+    </array>
+</resources>
\ No newline at end of file
diff --git a/app/src/main/res/values/styles.xml b/app/src/main/res/values/styles.xml
index 691680617..e36ac68c6 100644
--- a/app/src/main/res/values/styles.xml
+++ b/app/src/main/res/values/styles.xml
@@ -13,6 +13,20 @@
         <item name="android:itemTextAppearance">@style/menu_item_color</item>
     </style>
 
+    <style name="AppTheme.Spinner">
+        <item name="android:spinnerItemStyle">@style/SpinnerItem</item>
+        <item name="android:spinnerDropDownItemStyle">@style/SpinnerDropDownItem</item>
+    </style>
+
+    <style name="SpinnerItem">
+        <item name="android:gravity">right|center_vertical</item>
+        <item name="android:paddingRight">16dp</item>
+    </style>
+
+    <style name="SpinnerDropDownItem">
+        <item name="android:gravity">right|center_vertical</item>
+        <item name="android:paddingRight">16dp</item>
+    </style>
 
     <style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />