Samsung S6 Edge + no signal problem, can I get some help?

[AC Question]

Samsung S6 Edge + no signal problem

I bought an unlock Samsung S6 Edge + from AT&T, I have problem with the signal, It work fine but whenever I put the phone into sleep mode and turn it on there is a circle with slash icon on the top right corner and i need to restart the phone to have signal back

 

[srkmagnus]

Re: Samsung S6 Edge + no signal problem

Check to make sure that you have the right apn settings. Also, instead of rebooting, try toggling airplane mode on then off. That'll restore the connection.