I don't have any cell service. I have tried rebooting the phone. I use Telstra, other people using telstra don't have this issue. I have checked my telstra account and am in good standing. 

alticejason wrote:

I don't have any cell service. I have tried rebooting the phone. I use Telstra, other people using telstra don't have this issue. I have checked my telstra account and am in good standing. 

Contact your seller or our after-sales directly.
After-sales email: support02@blackview.hk
I suggest that you return the phone if they can not help you.