"Requests Are Processing": What AppHub and Carrier Hub Are Doing

What it is: the persistent Requests are processing notification comes from a carrier service app — usually Carrier Hub, sometimes labelled AppHub or Carrier Device Manager — preinstalled by your mobile network on Android.

It is not malware, and nothing is wrong with your phone. The app handles carrier features such as Wi-Fi calling and network provisioning, and the notification appears when it has started a task and not finished it. Usually it should have cleared in seconds and did not.

Why it gets stuck

The app is waiting on a response from the carrier's network that never arrives, and it displays a foreground notification for the duration. Common triggers:

• A weak or changing signal, or heavy Wi-Fi-to-cellular switching
• Wi-Fi calling failing to provision
• An unlocked phone on a carrier other than the one whose app is installed
• A dual-SIM setup confusing the provisioning logic

The last two explain the most persistent cases. A phone originally sold by one network, now on another, keeps the original network's service app, which sits there waiting for a network that will never answer.

Fixes, quickest first

1. Restart

Clears a genuinely transient stuck task. Try it before anything else.

2. Toggle Airplane Mode

On for ten seconds, then off. This forces the app to re-attempt provisioning and often lets it complete.

3. Clear the app's cache and data

1. Settings → Apps → tap the three-dot menu → Show system apps.
2. Find Carrier Hub (or AppHub / Carrier Device Manager).
3. Storage → Clear cache, then Clear storage.
4. Restart the phone.

This resets its state without removing it, and it is the fix that works most often.

4. Uninstall its updates

On the same app page, tap the three-dot menu and choose Uninstall updates to return it to the factory version. Worth trying when the notification started after a recent update.

5. Turn off Wi-Fi calling

Settings → Network & internet → Wi-Fi calling. If provisioning Wi-Fi calling is what it is stuck on, disabling it stops the loop. Turn it back on afterwards to see whether it provisions cleanly.

Getting rid of it permanently

Disable the app

On the app's page, tap Disable if the option is available. This is the practical answer if you are not on that carrier's network, since the app has nothing useful to do for you.

If you are on that carrier, be aware of the trade-off: disabling it can break Wi-Fi calling and VoLTE. On a phone that relies on Wi-Fi calling for indoor coverage, that is a real loss. Turn off just the notification instead.

Turn off just the notification

Long-press the notification and tap the settings icon, or go to Settings → Apps → Carrier Hub → Notifications and switch off the channel producing it. The app keeps working; the banner stops.

This is the best option for most people — it removes the annoyance without touching functionality.

Uninstall it

Most carrier apps cannot be uninstalled normally. Where Uninstall is offered on the app page, it is safe to use if you are not on that carrier. Removing it via ADB is possible but is not worth the risk on a phone you depend on.

Is it spying on me?

It is a carrier app with network and device permissions, which is why it looks alarming when you inspect it. Its purpose is provisioning carrier services rather than monitoring you. That said, if you are not a customer of the carrier that installed it, there is no reason to keep it enabled, and disabling it costs you nothing.

If you want to be certain the app is genuine, check Settings → Apps → Carrier Hub → App details and confirm it was installed from the Play Store or came with the system image, rather than sideloaded.

Related names you may see

• Carrier Hub — the most common name, on T-Mobile and Sprint devices
• Carrier Device Manager — the same role under a different label
• MCM Client — a component bundled with Carrier Hub, and a frequent source of the same notification
• AppHub — how some phones and some users report it

The fixes are identical in every case.

FAQs

Is it draining my battery?

A stuck task can keep a wake lock. Check Settings → Battery for the app; if it appears high, clearing its data is the fix.

Will disabling it stop my calls working?

Normal calls continue. Wi-Fi calling and VoLTE may stop if you are on that carrier's network.

Why did it appear after I changed networks?

The previous carrier's app is still installed and is trying to provision against a network you are no longer on. Disable it.

Does a factory reset fix it?

It returns after a reset, because it is part of the system image. Clearing its data achieves the same thing without the reset.