I go to a T-Mobile store to buy a prepaid SIM card. I look at the options they have, and choose a plan that only gives data connectivity with no voice calls or text messages. A few days later, I need to make voice calls. I look around their web site, but there's no way to add voice support on the phone. So I go to the store again and ask them to add voice support to my phone. "Oh that's not possible. Do you want to buy a new SIM?"
Annoyed, but left with no other option, I buy a new SIM with $10 credit for voice calls. When I put the SIM on the phone, it won't connect to the Internet. The storekeeper had said that I can get a "day pass" data connectivity by paying around a dollar and a half. I have already paid $10, so they should deduct from that credit for the day pass, right? Turns out they won't do that either. I have to buy it separately.
So I open T-Mobile's web site, and there's no link or option that would let me buy that damned day pass. I would have to go to the shop again tomorrow to buy it.
I'm glad I don't live in the US.