Troubleshoots Viettel

Frequently asked questions about Viettel phones, tablets and watches

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