diff --git a/packages/app/e2e/browser/pair-device-relay.spec.ts b/packages/app/e2e/browser/pair-device-relay.spec.ts
index 8c4e306a1e..dbd3814d38 100644
--- a/packages/app/e2e/browser/pair-device-relay.spec.ts
+++ b/packages/app/e2e/browser/pair-device-relay.spec.ts
@@ -1,6 +1,8 @@
 import { test } from "../support/fixtures";
 import { startIsolatedHostDaemon } from "../support/helpers/isolated-host-daemon";
 import {
+  expectPairingOffer,
+  expectCompletePairingQr,
   expectRelayConsent,
   openPairDeviceModal,
   preparePairingHost,
@@ -18,3 +20,20 @@ test("opens relay consent in browser web", async ({ page }) => {
     await daemon.close();
   }
 });
+
+test("keeps the pairing QR code inside its compact tile", async ({ page }, testInfo) => {
+  const daemon = await startIsolatedHostDaemon("pair-device-browser-compact", {
+    mutableRelay: { enabled: true },
+  });
+  try {
+    await preparePairingHost(page, daemon);
+    await page.setViewportSize({ width: 320, height: 568 });
+    await openPairDeviceModal(page);
+    await expectPairingOffer(page);
+
+    await expectCompletePairingQr(page);
+    await page.screenshot({ path: testInfo.outputPath("pairing-compact.png") });
+  } finally {
+    await daemon.close();
+  }
+});
diff --git a/packages/app/e2e/mobile/pair-device/android.mjs b/packages/app/e2e/mobile/pair-device/android.mjs
new file mode 100644
index 0000000000..7ab660c2b0
--- /dev/null
+++ b/packages/app/e2e/mobile/pair-device/android.mjs
@@ -0,0 +1,43 @@
+// Start on Settings > Host > Pair device with relay enabled in the Android app.
+// node packages/app/e2e/mobile/pair-device/android.mjs <agent-device-session>
+import assert from "node:assert/strict";
+import { execFileSync } from "node:child_process";
+
+const [, , session] = process.argv;
+assert(session, "Pass the agent-device session for the connected Android app");
+
+function ad(...args) {
+  return execFileSync("agent-device", [...args, "--session", session], {
+    encoding: "utf8",
+    timeout: 60_000,
+  });
+}
+
+ad(
+  "press",
+  'label="Pair a device, Scan a QR code or copy a link to connect your phone to this host"',
+  "--settle",
+);
+ad("wait", "text", "Pairing QR code", "10000");
+const { data } = JSON.parse(ad("snapshot", "-i", "--json"));
+const sheet = data.nodes.find((node) => node.label === "Bottom Sheet");
+const qr = data.nodes.find((node) => node.label === "Pairing QR code");
+assert(sheet?.rect, "Pairing sheet must be visible");
+assert(qr?.rect, "Pairing QR code must be visible");
+assert(qr.rect.x > sheet.rect.x, "QR must have an unclipped left margin inside the sheet");
+assert(
+  qr.rect.x + qr.rect.width < sheet.rect.x + sheet.rect.width,
+  "QR must have an unclipped right margin inside the sheet",
+);
+assert(Math.abs(qr.rect.width - qr.rect.height) <= 1, "Complete QR must remain square");
+assert(qr.rect.y >= sheet.rect.y, "QR top must be visible inside the sheet");
+assert(
+  qr.rect.y + qr.rect.height <= sheet.rect.y + sheet.rect.height,
+  "QR bottom must be visible inside the sheet",
+);
+assert(
+  data.nodes.some((node) => node.label === "Copy" && node.enabled),
+  "Copy must remain available",
+);
+console.log("PASS: complete square QR fits inside the pairing sheet", qr.rect);
+ad("press", 'label="Close"', "--settle");
diff --git a/packages/app/e2e/support/helpers/pair-device.ts b/packages/app/e2e/support/helpers/pair-device.ts
index d8908015b8..46cdda5ed9 100644
--- a/packages/app/e2e/support/helpers/pair-device.ts
+++ b/packages/app/e2e/support/helpers/pair-device.ts
@@ -220,3 +220,24 @@ export function expectDaemonPidUnchanged(
   expect(before).toBeDefined();
   expect(after).toBe(before);
 }
+
+export async function expectCompletePairingQr(page: Page): Promise<void> {
+  const qr = page.getByRole("img", { name: "Pairing QR code" });
+  await qr.scrollIntoViewIfNeeded();
+  // IntersectionObserver rounds fractional sheet/scroll coordinates.
+  await expect(qr).toBeInViewport({ ratio: 0.999 });
+  const bounds = await qr.evaluate((element) => {
+    const tile = element.parentElement;
+    if (!tile) throw new Error("Pairing QR tile is missing");
+    const qrRect = element.getBoundingClientRect();
+    const tileRect = tile.getBoundingClientRect();
+    return {
+      qr: { x: qrRect.x, y: qrRect.y, right: qrRect.right, bottom: qrRect.bottom },
+      tile: { x: tileRect.x, y: tileRect.y, right: tileRect.right, bottom: tileRect.bottom },
+    };
+  });
+  expect(bounds.qr.x).toBeGreaterThanOrEqual(bounds.tile.x);
+  expect(bounds.qr.y).toBeGreaterThanOrEqual(bounds.tile.y);
+  expect(bounds.qr.right).toBeLessThanOrEqual(bounds.tile.right);
+  expect(bounds.qr.bottom).toBeLessThanOrEqual(bounds.tile.bottom);
+}
diff --git a/packages/app/src/desktop/components/pair-device-section.tsx b/packages/app/src/desktop/components/pair-device-section.tsx
index 9209f6fcbf..982469008a 100644
--- a/packages/app/src/desktop/components/pair-device-section.tsx
+++ b/packages/app/src/desktop/components/pair-device-section.tsx
@@ -80,7 +80,6 @@ export function PairDeviceSection({ serverId, onClose }: PairDeviceSectionProps)
         type: "svg",
         errorCorrectionLevel: "M",
         margin: 1,
-        width: 480,
       }),
     enabled: Boolean(pairingQuery.data?.url),
     dataShape: "value",
@@ -275,7 +274,8 @@ function PairingQr({ svg, isError }: { svg: string | null; isError: boolean }) {
     return (
       <SvgXml
         xml={svg}
-        style={styles.qrImage}
+        width="100%"
+        height="100%"
         accessibilityRole="image"
         accessibilityLabel={t("pairing.device.qrAccessibility")}
       />
@@ -365,10 +365,6 @@ const styles = StyleSheet.create((theme) => ({
     borderColor: theme.colors.border,
     backgroundColor: theme.colors.palette.white,
   },
-  qrImage: {
-    width: "100%",
-    height: "100%",
-  },
   linkRow: {
     flexDirection: "row",
     alignItems: "center",