@Ktieu9 sometimes toggling into and out of airplane mode can help with network issues.
You may also try to perform a Reset of your device's Network Settings.
This also resets Wi-Fi networks and passwords, cellular settings, and VPN and APN settings that you've used before.
To Reset Network Settings, begin by opening the Settings app. Next, tap General -> Transfer or Reset iPhone -> Reset -> Reset Network Settings. and enter your passcode.
Your iPhone will reset network settings and restart itself.
Find and tap Settings > System > Advanced > Reset options > Reset network settings.
Try manually select the 3G / WCDMA ONLY network in your Mobile Connections area in your settings (temporarily) to see if that helps with services.
Otherwise, if you are able to try your SIM into another phone and still have issues, or if other Public Mobile customers around you are experiencing same issues, hopefully this is just a temporary issue.
No issue in any notifications. PM (Telus) has reciprocal agreements with others to use there towers in the east.
To reset sim...power OFF the phone. Remove sim...wait a moments and reinstall sim in phone. Restart phone. See if that helps.