If a recent update caused the overheating, a corrupted cache is likely to blame. Turn off your ZTE Blade A51.

To prevent the from running hot in the future, follow these tips:

: Download the specific .pac firmware package matching your regional variant (e.g., European, Latin American, or Global version) from the official ZTE Support Portal .

The utility will write system files, boot images, and recovery partitions to your device sequentially. This takes roughly 5 to 10 minutes. Once finished, a bright green status message will appear. You can safely unplug your USB cable and power the phone on. The initial bootup may take up to 8 minutes as it configures the new operating system. Safer Alternatives: Updating Firmware via Settings

If you’re uncomfortable with PC flashing, consider:

Before downloading any firmware, check the on the back of your phone or under Settings > About Phone .