Troubleshoots ZH-K

Frequently asked questions about ZH-K phones, tablets and watches

Answers to frequently asked questions on ZH-K devices. Reasons for a hard reset or reset a ZH-K, Is it safe to do a hard reset or format in a ZH-K?, What data is deleted when performing a hard reset in a ZH-K?, What should I do before doing a hard reset?, Can I install Fortnite on my ZH-K?, I forgot the PIN code of my ZH-K, I forgot unlock pattern, How to make my ZH-K faster?, How to update my ZH-K? How to backup my ZH-K?