Voice on Nokia 225 no longer working.

My wife had this phone and found it was failing more and more often in the last few months, and when she was last in Canada she could call me and I could successfully text her from the States, but I couldn't call her and no one in the US could either. Tmobile customer service and store staff had no explanation. So if for some this phone is still not working and you can't get 2G service (many areas of the US now can't), consider that most people on this post seem to be using the legacy voice/text prepay plan, as I and my wife both do. This means that since the Nokia 225 has no KaiOS, base open source Android, or other operating system or wifi capability, they can't update the firmware on the phone. The "system reset" that everyone has been talking about about does not update anything. The only way to update the firmware is by having a data plan, a choice which doesn't make a lot of sense for a dumbphone. Fortunately my father lost his legacy Tmobile prepay plan and had to subscribe to one with data (UltraMobile $3/month plan), data that he will never use, so if this phone is still not working I am going to try using his SIM card in her phone and clicking on the software update tab.  Interested to know if this works for anyone else.