Since all 5 TELUS Mobility cell phones are encountering the same issues, that rules out most device specific issues.
I have reviewed the TELUS Outages Map and found no issues in Parkland County. I would still suggest that you contact TELUS Mobility Technical Support ( 1-866-558-2273 or *611 on your TELUS mobile phone ) and report this issue so they can begin tracking it, and investigate if there is a network issue in your area.
Here are some troubleshooting steps you can try on your phones:
If these options do not help, you can also refer to the Troubleshoot: Can't make or receive phone calls
I hope that helps!