Phone is an iPhone 5 that was previously on Telus, moved to different number on Koodo and has been working fine in Canada for months on a $35/month plan (200 minutes, 50 MB of data and Unlimited text & picture messaging). Added 30ALL US roaming plan during travel to US. Texting is working fine but have to reboot phone to make data work and then it only works for a few minutes. Also, cannot make any phone calls - they just don't connect.
Unfortunately, this is my son's phone and he is the one in the US so I cannot try anything directly. I will have to relay any information to him ... by text unfortunately. Any ideas