Bests & Worsts Reviews from Amazon

I purchased this for use in an unlocked iPhone and found that it activated smoothly via the on-line instructions and was preloaded with a few dollars for minutes. This was welcome, because I was then able to test the signal and verify that I could make calls on the T-Mobile network. What's more, as of 11/2010, T-Mobile offers a pay-as-you-go data package for $1.49/24h on their Edge network. With about $20 put into the card on-line, I can travel and use both data and talk minutes without a contract or any recurring payments. Previously, I was using the ATT GoPhone service, but ATT cut out all of their roaming partners, so coverage is abysmal in rural areas. I'm purchasing a second T-Mobile SIM tonight for my wife. Beware. Don't buy the other Amazon T-Mobile SIM for "unactivated replacement." This SIM is only for replacing an existing lost SIM and is not for activating new accounts.