I've been on the typical annual cell phone plans with Tmobile and then Verizon now for over a decade, so have not really been paying attention to "pay as you go" options. I have some relatives who live outside of the US, but will be spending 1-2 months at a time in the US over the next few years. It would thus not make sense for them to maintain a monthly or even annual contract with a provider. Are there still any viable "pay as you go" options that might be good options for them? I know in the UK, Australia, and parts of South East Asia, you can purchase SIM cards that come loaded with $x of credit (and/or data). They also come with predetermined phone numbers. The numbers and credit expire after x months of activation, unless you reload or top the account up with more credit. Is there anything similar in the US?