@shkhan300
Have you tried all of the suggestions so far? After trying everything listed by @HALIMACS has switching to 3G only seem to have solved the issue? If so you can try switching back to the 4G LTE/3G/2G (autoconnect) setting every few days to see if the issue returns as it is likely due to equipment upgrades on local cell towers that all three of the main providers are currently in the process of completing across Canada.
The reason your voice calls are diverting to voicemail is because public mobile uses the 3G network for calling as such it switches from the 4G LTE network to the 3G network and with the upgrades slight delays can occur causing calls to default to voicemail. Remaining on the 3G network ensures calls connect immediately and ring thru to your phone. Texting and mobile data also work on the 3G network so they remain unaffected with your data speed actually increasing up to 20+mbps but with higher latency.
In most cases of customers reporting this issue the equipment upgrade work lasts a couple of weeks and your calling issue will resolve itself. At that time you can change from 3G only to your 4G LTE/3G/2G (autoconnect) setting and remain there.
To contact customer support click below:
https://productioncommunity.publicmobile.ca/t5/notes/composepage/note-to-user-id/22437
To pre-verify your account include your full name, address, email, phone # and 4 digit acct pin #.
