Expiration date bug for Legacy Pay As You Go?

I too have had a Pay As You Go legacy plan now for I figure at least 15 years. It's a back up phone I only use rarely but for 10 bucks a year it's nice to have.

I paid my 10 bucks back in Feb. and it actually has the correct 1 year expiration date, I wasn’t aware of an issue with the dates until I read this thread.

I came here looking for info on changing my phone. I have an old (realmente old) Samsung E105 flip phone and I suspect with the shutdown of 3G it's going to stop working very soon and I'll be forced to get a new one. My question is if i do get a new phone will i lose my Pay As You Go plan?

I don't want to become a monthly prepaid user: I already have that set up with another carrier. Ten, 20 even 25 bucks for an entire year however is fine and well worth it.

I’m just afraid if I try to activate another phone T-Mo will have an excuse to eliminate my Pay As You Go and I’ll be stuck with a phone I don’t want.

I should also add that the SIM card in the E105 is too large to fit into the newer phones. I discovered that when I upgraded a 2013 Samsung A3 to a new moto e (my US Cellular prepaid)

In that case I had to call CS and they were terrific setting it up and they let me stay on my current lower cost monthly plan.