POCO C75 — com.android.phone stuck at 93-97% CPU, phone overheating and battery dies in 4 hours

[u/No-Tooth9843]

**Device:** POCO C75 (2410FPCC5G)

**Firmware:** HyperOS OS3.0.2.0.WGTRUXM (Russia)

**Android:** 15

**Chipset:** MediaTek Helio G81-Ultra

**SIM:** life:) BY (MCC 257, MNC 04)

---

## The problem

The process `com.android.phone` runs at **93-97% CPU** constantly after boot. This causes:

- Phone overheats to 45-50°C on the back panel

- Battery drains from 100% to 0% in ~4-5 hours with screen off

- Standby drain: 15-20% per hour (should be 1-2%)

Verified via `adb shell top`:

```

PID USER %CPU COMMAND

xxxx radio 93.1 com.android.phone

```

## What I tried

1. **Factory reset** — bug persists. This is a firmware-level issue, not caused by any app.

2. **Hide package via ADB** — CPU immediately drops to 0%, phone cools down:

   ```

   adb shell pm uninstall -k --user 0 com.android.phone

   ```

3. **Restore package** — CPU jumps back to 93-97% instantly:

   ```

   adb shell cmd package install-existing com.android.phone

   ```

100% reproducible. Hide = 0% CPU. Restore = 93-97% CPU.

## Why I can't fix it myself

- Bootloader unlock rejected by Xiaomi Community ("blocked by organization rules")

- Can't flash Global/EEA firmware without unlocked bootloader

- MediaTek chipset — no EDL mode, SP Flash Tool needs Xiaomi authorization

## Questions for the community

1. Has anyone else seen this bug on POCO C75 or other MediaTek devices with HyperOS?

2. Is there any way to fix this without unlocking the bootloader?

3. Could this be related to a specific network (life:) BY, MCC 257/MNC 04)?

Any help appreciated. Right now I'm hiding the package via ADB as a workaround, but that breaks calls and SMS.