Why can’t the Hammer Nut mobile phone system be upgraded?

The version is too low and cannot be upgraded. Go to Smartisan’s official website to download the updated software package.

The version is too low and the low version cannot be directly updated to the latest system. You need to download the update package from the official website. The version has been updated many times before, but your phone has not been updated, so it cannot be updated now.

Specific steps:

1. Open the official website of Hammer.

2. Find the system update service.

3. Scan the QR code and download the update package to your mobile phone for update.

Hammer will also send a text message to the user’s mobile phone to provide the download address of the update package.