Why does my signal indicator shift from 4G to H every time I make a phone call?
The signal is unstable. What should I do?
What should I do if there is no Baseband driver on my phone?
What is VPN and what is the use of VPN?
Why can others not call me but I can phone them?
Which carrier in Chinese Mainland can vivo phones sold out of Chinese Mainland support the SIM card from?
Does vivo phone support “Auto hang up the phone and reply SMS” when I am busy?
Does the metal cover affect the signal?
Why is my phone bill charged gratuitously?
How to create VPN on settings?
How to check the phone Mac address?
How to check the Baseband version?
Can I surf the Internet while I am talking on the phone?
The call ends automatically when talking on my vivo phone. What should I do?
What is Baseband version?
Can I make phone calls without SIM card?
Why can I not record the calling voice via Screen recording with Record Voice on?
Can the MAC address be changed?
Can I play my phone when in thunders?
Why does my phone make phone calls automatically?
The calling always ends automatically in several minutes. What should I do?
How can I know whether my vivo phone supports the network in my country?