Hi @Richard_3041234
Thank you for reaching out to our SMARTY community forum.
I believe you may be affected by our 3G switch off as calls are affected when trying to make and receive calls from your SMARTY SIM.
Please follow this link as this is a list of devices no longer compatible with our network:
Checking if your device is 4G-VoLTE compatible | SMARTY Help Centre
If you device is listed here then unfortunately, it can no longer be used with SMARTY. If you require additional information, please speak to our webchat team here:
https://smarty.co.uk/contact
I hope this helps!
- Jodie
