diff --git a/.skills/compose-ui/strings-index.txt b/.skills/compose-ui/strings-index.txt
index f6884c99d5..e4e05df8c5 100644
--- a/.skills/compose-ui/strings-index.txt
+++ b/.skills/compose-ui/strings-index.txt
@@ -614,6 +614,8 @@ label_narrow_slow
 label_short_fast
 label_short_slow
 label_short_turbo
+label_tiny_fast
+label_tiny_slow
 label_very_long_slow
 last_heard_filter_label
 last_position_update
diff --git a/build.gradle.kts b/build.gradle.kts
index e6b32a9736..b5eece44ae 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -60,3 +60,23 @@ plugins.withId("org.meshtastic.flatpak.sources") {
 dependencies {
     dokkaPlugin(libs.dokka.android.documentation.plugin)
 }
+
+// ─── TEMPORARY: protobufs develop-SNAPSHOT preview (PR #5790) ────────────────────────────────────
+// We track the unreleased protobufs develop-SNAPSHOT. takpacket-sdk-jvm:0.5.3 transitively pins
+// protobufs:2.7.25, and Gradle ranks 2.7.25 > develop-SNAPSHOT (a numeric part outranks the
+// "develop" string qualifier). That downgrades the test *runtime* classpath to 2.7.25 while the
+// common-metadata *compile* uses the snapshot, yielding NoSuchFieldError/NoSuchMethodError on the
+// proto-generated classes at test runtime (assembleDebug/detekt don't catch it; test/allTests do).
+// Force every protobufs* variant to the snapshot so compile and runtime agree. Safe because
+// atak.proto is unchanged, so takpacket's own message ABI stays compatible with the newer protobufs.
+// REMOVE once takpacket-sdk (and mqtt) are republished against the new protobufs.
+allprojects {
+    configurations.all {
+        resolutionStrategy.eachDependency {
+            if (requested.group == "org.meshtastic" && requested.name.startsWith("protobufs")) {
+                useVersion("develop-SNAPSHOT")
+                because("preview #5790: override takpacket transitive protobufs:2.7.25 pin")
+            }
+        }
+    }
+}
diff --git a/core/model/src/androidDeviceTest/kotlin/org/meshtastic/core/model/ChannelTest.kt b/core/model/src/androidDeviceTest/kotlin/org/meshtastic/core/model/ChannelTest.kt
index 656afc56aa..ce98ce998b 100644
--- a/core/model/src/androidDeviceTest/kotlin/org/meshtastic/core/model/ChannelTest.kt
+++ b/core/model/src/androidDeviceTest/kotlin/org/meshtastic/core/model/ChannelTest.kt
@@ -24,7 +24,6 @@ import org.meshtastic.core.model.util.CHANNEL_URL_PREFIX
 import org.meshtastic.core.model.util.getChannelUrl
 import org.meshtastic.core.model.util.toChannelSet
 import org.meshtastic.proto.ChannelSet
-import org.meshtastic.proto.Config
 
 @RunWith(AndroidJUnit4::class)
 class ChannelTest {
@@ -64,18 +63,4 @@ class ChannelTest {
 
         Assert.assertEquals(906.875f, ch.radioFreq)
     }
-
-    @Test
-    fun allModemPresetsHaveValidNames() {
-        Config.LoRaConfig.ModemPreset.entries.forEach { preset ->
-            // Skip UNRECOGNIZED if it exists (Wire generates it sometimes) or generic UNSET values if applicable
-            if (preset.name == "UNSET" || preset.name == "UNRECOGNIZED") return@forEach
-
-            val loraConfig = Channel.default.loraConfig.copy(use_preset = true, modem_preset = preset)
-            val channel = Channel(loraConfig = loraConfig)
-
-            // We want to ensure it is NOT "Invalid"
-            Assert.assertNotEquals("Preset ${preset.name} should typically have a valid name", "Invalid", channel.name)
-        }
-    }
 }
diff --git a/core/model/src/commonMain/kotlin/org/meshtastic/core/model/Channel.kt b/core/model/src/commonMain/kotlin/org/meshtastic/core/model/Channel.kt
index 51f27fdbcc..cb058cedbe 100644
--- a/core/model/src/commonMain/kotlin/org/meshtastic/core/model/Channel.kt
+++ b/core/model/src/commonMain/kotlin/org/meshtastic/core/model/Channel.kt
@@ -67,7 +67,14 @@ data class Channel(val settings: ChannelSettings = default.settings, val loraCon
         get() =
             settings.name.ifEmpty {
                 // We have a new style 'empty' channel name.  Use the same logic from the device to convert that to a
-                // human readable name
+                // human readable name.
+                //
+                // INTEROP-CRITICAL: these strings must byte-match the firmware, because the channel hash, channel
+                // number / radio frequency, and MQTT topic all derive from this name (see `hash`, `channelNum`).
+                // Source of truth: firmware DisplayFormatters::getModemPresetDisplayName(preset, useShortName=false).
+                // Two names are deliberately abbreviated (LONG_MODERATE -> "LongMod", VERY_LONG_SLOW -> "VLongSlow"),
+                // so do NOT auto-derive from the enum name. This `when` is intentionally exhaustive with no `else`: a
+                // new firmware preset SHOULD break the build here, forcing someone to copy its exact firmware name.
                 if (loraConfig.use_preset) {
                     when (loraConfig.modem_preset) {
                         ModemPreset.SHORT_TURBO -> "ShortTurbo"
@@ -84,6 +91,8 @@ data class Channel(val settings: ChannelSettings = default.settings, val loraCon
                         ModemPreset.LITE_SLOW -> "LiteSlow"
                         ModemPreset.NARROW_FAST -> "NarrowFast"
                         ModemPreset.NARROW_SLOW -> "NarrowSlow"
+                        ModemPreset.TINY_FAST -> "TinyFast"
+                        ModemPreset.TINY_SLOW -> "TinySlow"
                     }
                 } else {
                     "Custom"
diff --git a/core/model/src/commonMain/kotlin/org/meshtastic/core/model/ChannelOption.kt b/core/model/src/commonMain/kotlin/org/meshtastic/core/model/ChannelOption.kt
index da6ae71cda..d64ba13de6 100644
--- a/core/model/src/commonMain/kotlin/org/meshtastic/core/model/ChannelOption.kt
+++ b/core/model/src/commonMain/kotlin/org/meshtastic/core/model/ChannelOption.kt
@@ -311,6 +311,11 @@ enum class ChannelOption(val modemPreset: ModemPreset, val bandwidth: Float) {
     LITE_SLOW(ModemPreset.LITE_SLOW, 0.125f),
     NARROW_FAST(ModemPreset.NARROW_FAST, 0.0625f),
     NARROW_SLOW(ModemPreset.NARROW_SLOW, 0.0625f),
+
+    // 15.625 kHz LoRa bandwidth (firmware modemPresetToParams; the proto's "20kHz" is the
+    // padded channel spacing, not the modem bandwidth used for numChannels/radioFreq math).
+    TINY_FAST(ModemPreset.TINY_FAST, 0.015625f),
+    TINY_SLOW(ModemPreset.TINY_SLOW, 0.015625f),
     ;
 
     companion object {
diff --git a/core/model/src/commonTest/kotlin/org/meshtastic/core/model/ChannelPresetNameTest.kt b/core/model/src/commonTest/kotlin/org/meshtastic/core/model/ChannelPresetNameTest.kt
new file mode 100644
index 0000000000..3aa87b1db9
--- /dev/null
+++ b/core/model/src/commonTest/kotlin/org/meshtastic/core/model/ChannelPresetNameTest.kt
@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2026 Meshtastic LLC
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package org.meshtastic.core.model
+
+import org.meshtastic.proto.Config.LoRaConfig.ModemPreset
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+/**
+ * Contract test pinning the preset -> channel-name mapping in [Channel.name].
+ *
+ * This name is INTEROP-CRITICAL: for a channel with an empty name and `use_preset = true`, the name is hashed into the
+ * channel hash, the channel number / radio frequency, and the MQTT topic, so it must byte-match the firmware. Source of
+ * truth is firmware `DisplayFormatters::getModemPresetDisplayName(preset, useShortName = false)`. Two names are
+ * deliberately abbreviated (LONG_MODERATE -> "LongMod", VERY_LONG_SLOW -> "VLongSlow") and must NOT be auto-derived
+ * from the enum name.
+ *
+ * When firmware adds a preset, [Channel.name]'s exhaustive `when` fails to compile first (by design). This test is the
+ * backstop: it forces the new branch to carry the EXACT firmware name, guards the mapping against accidental edits, and
+ * fails if a preset is left unpinned (e.g. someone silenced the compile error with an `else`). It deliberately covers
+ * the deprecated VERY_LONG_SLOW, which still has a real firmware name. The numeric anchors (hash/channelNum/radioFreq)
+ * live in ChannelTest and are the genuine on-air interop guard — keep both.
+ */
+class ChannelPresetNameTest {
+
+    // Firmware-canonical names: DisplayFormatters::getModemPresetDisplayName(preset, useShortName = false).
+    private val expectedNames =
+        mapOf(
+            ModemPreset.SHORT_TURBO to "ShortTurbo",
+            ModemPreset.SHORT_FAST to "ShortFast",
+            ModemPreset.SHORT_SLOW to "ShortSlow",
+            ModemPreset.MEDIUM_FAST to "MediumFast",
+            ModemPreset.MEDIUM_SLOW to "MediumSlow",
+            ModemPreset.LONG_FAST to "LongFast",
+            ModemPreset.LONG_SLOW to "LongSlow",
+            ModemPreset.LONG_MODERATE to "LongMod",
+            ModemPreset.VERY_LONG_SLOW to "VLongSlow",
+            ModemPreset.LONG_TURBO to "LongTurbo",
+            ModemPreset.LITE_FAST to "LiteFast",
+            ModemPreset.LITE_SLOW to "LiteSlow",
+            ModemPreset.NARROW_FAST to "NarrowFast",
+            ModemPreset.NARROW_SLOW to "NarrowSlow",
+            ModemPreset.TINY_FAST to "TinyFast",
+            ModemPreset.TINY_SLOW to "TinySlow",
+        )
+
+    private fun presetChannelName(preset: ModemPreset): String =
+        Channel(loraConfig = Channel.default.loraConfig.copy(use_preset = true, modem_preset = preset)).name
+
+    @Test
+    fun every_preset_maps_to_its_exact_firmware_name() {
+        expectedNames.forEach { (preset, expected) ->
+            assertEquals(expected, presetChannelName(preset), "Channel name for $preset must match firmware exactly")
+        }
+    }
+
+    @Test
+    fun every_ModemPreset_is_pinned() {
+        val protoPresets = ModemPreset.entries.filter { it.name != "UNSET" && it.name != "UNRECOGNIZED" }.toSet()
+        assertEquals(
+            protoPresets,
+            expectedNames.keys,
+            "Every ModemPreset must be pinned to its firmware name here. A new preset was added to the protos " +
+                "(and to Channel.name's `when`) but not recorded in this contract — add it with its exact " +
+                "DisplayFormatters::getModemPresetDisplayName string.",
+        )
+    }
+}
diff --git a/core/resources/src/commonMain/composeResources/values/strings.xml b/core/resources/src/commonMain/composeResources/values/strings.xml
index 6c59d355d7..92b6dffab9 100644
--- a/core/resources/src/commonMain/composeResources/values/strings.xml
+++ b/core/resources/src/commonMain/composeResources/values/strings.xml
@@ -638,6 +638,8 @@
     <string name="label_short_fast">Short Range - Fast</string>
     <string name="label_short_slow">Short Range - Slow</string>
     <string name="label_short_turbo">Short Range - Turbo</string>
+    <string name="label_tiny_fast">Tiny - Fast</string>
+    <string name="label_tiny_slow">Tiny - Slow</string>
     <string name="label_very_long_slow">Very Long Range - Slow</string>
     <string name="last_heard_filter_label">Filter by Last Heard time: %1$s</string>
     <string name="last_position_update">Last position update</string>
diff --git a/core/ui/src/commonMain/kotlin/org/meshtastic/core/ui/util/ModelExtensions.kt b/core/ui/src/commonMain/kotlin/org/meshtastic/core/ui/util/ModelExtensions.kt
index a6dd1b947c..c1250f15fd 100644
--- a/core/ui/src/commonMain/kotlin/org/meshtastic/core/ui/util/ModelExtensions.kt
+++ b/core/ui/src/commonMain/kotlin/org/meshtastic/core/ui/util/ModelExtensions.kt
@@ -33,6 +33,8 @@ import org.meshtastic.core.resources.label_narrow_slow
 import org.meshtastic.core.resources.label_short_fast
 import org.meshtastic.core.resources.label_short_slow
 import org.meshtastic.core.resources.label_short_turbo
+import org.meshtastic.core.resources.label_tiny_fast
+import org.meshtastic.core.resources.label_tiny_slow
 import org.meshtastic.core.resources.label_very_long_slow
 import org.meshtastic.core.resources.traceroute_endpoint_missing
 import org.meshtastic.core.resources.traceroute_map_no_data
@@ -54,6 +56,8 @@ val ChannelOption.labelRes: StringResource
             ChannelOption.LITE_SLOW -> Res.string.label_lite_slow
             ChannelOption.NARROW_FAST -> Res.string.label_narrow_fast
             ChannelOption.NARROW_SLOW -> Res.string.label_narrow_slow
+            ChannelOption.TINY_FAST -> Res.string.label_tiny_fast
+            ChannelOption.TINY_SLOW -> Res.string.label_tiny_slow
         }
 
 fun TracerouteMapAvailability.toMessageRes(): StringResource? = when (this) {
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 5a828f60c3..9f622b1316 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -88,7 +88,7 @@ mqttastic = "0.3.8"
 jmdns = "3.6.3"
 qrcode-kotlin = "4.5.0"
 takpacket-sdk = "0.5.3"
-meshtastic-protobufs = "2.7.25"
+meshtastic-protobufs = "develop-SNAPSHOT"
 
 # Gradle Plugins
 develocity = "4.4.2"