@Kennyp You probably don't want to try reset network yet. On some phones, the APN settings will need to be entered manually after a reset and hence your data might stop working althogether.
Also, not sure about changing to 3G will helps. Usually changing to 3G is for issue like you phone cannot change from LTE network to 3G and hence calls dropped. Since your calls already established and just cutting out, I am afraid this might not address your issue.
all company has bad Poor reception in basement,
Plans with 3G data may reach download speeds of up to 3 Mbps, with the coverage and reliability of the LTE network. Speed and signal strength may vary with your device, configuration, Internet traffic, environmental conditions, applicable network management and other factors.
I had the same problem. To remedy the situation, I installed an IP telephony application (Textnow). Calls are made via WIFI and in my case, it solved my phone cut-off problems.
The only disadvantage to this solution is that you can't use your PM number. Another number is assigned to you.
It may not be the best solution, but it is effective and solves the problem. This would save you from spending hours looking for a solution by opening a ticket.
Yes, using VoIP could be a workaround. You can forward if no answer to your VoIP number
Another possible workaround is to use a bluetooth headset. Leave your phone on the main floor and talk on bluetooth. If you are going with this solution and don't mind some investment, you can also get one of those Panasonic bluetooth wireless cordless phones.
But, I suggest to wait another week or two and see if the situation gets better. It could be just a network tower issue and Telus or Bell just need time to fix it.