Tearing off is generally not allowed.
If the mobile phone you buy is still within the warranty period, you cannot remove the label, otherwise there will be no way to repair it. If it's not there, you can tear it off.
The following methods are available:
1. Blow the hair dryer on the label until the glue of the trademark is hot, and then the label can be easily removed.
2. Use ordinary body lotion, apply it on the label, and apply it in circles with a little pressure like massaging.
3. Let the lotion penetrate into the entire trademark. After a while, it can be completely removed without leaving any traces. It can also be used to remove the remaining traces of glue.