Can't make or receive calls

[kylamorr_923767]

I've been using SMARTY for a month with no problems but suddenly can't make or receive calls. I got a new SIM and data/texts is fine.

I've done a factory reset, reset phones and network and have a strong signal.

My phone is. POCO M4 Pro. 

[LucileS_Fr]

I have the same issues with not able to phone even the mail box, not recieving calls and this issue has been bad since I have been using smarty for about a month. And today it was even worse and not able to send any texts and the data were also down. 

I would like to know if there is some big issues in Glasgow at the moment.. the signal checker said it is all fine but nothing... 

[MSF]

@LucileS_Fr  Have you checked that your phone is compatible with Smarty VoLTE protocol? I mention this as you say that you have had problems since joining.

[MSF]

@kylamorr_923767  Have you completed a Network Status check for your area?

[kylamorr_923767]

Yes, I ordered a new SIM, reset factory settings,  took out the SIM and restarted the phone,  reset network settings,  gave customer service my phone IMEI.