I'm going to NYC for 3 days at the end of May, so I just bought a T-Mobile Prepaid activation kit on ebay, and I'll probably just put 10$ airtime on it. (won't be using it much...) I just saw on their web site that I can choose Pay By The Day, which would give me 70 minutes + free from 7pm to 7am for my 10$, instead of only 30 minutes of airtime with regular PAYG. Are there any catches with Pay By The Day? It seems like a better idea for short trips... How's T-Mobile coverage in NYC? Thanks for your help! I'll be using an unlocked BB 8320 which was originally locked to T-Mobile, that'll work fine for PAYG, right?