I'm heading to Mazatlan pretty soon and a now thinking about how the iPhone will fare while I'm out and about. I have a few questions, one involves jailbreaking, the other "doesn't". Please bare with me, lol. 1. I've read to turn off data roaming and not answer your phone, to put it in airplane mode, etc. I don't plan to make any calls unless the second question gets answered. Considering I'll be making no calls, I still need the ability to use GPS. I will be pre-loading maps, so the data transfer is a non issue, but airplane mode kills GPS. Is there a way to kill everything but wifi and GPS? I don't need anything else. jailbreak apps are okay as I'm currently jailbroken at 3.1.2 with my 3Gs 2. I don't NEED to make any calls while in Mexico, but it might be kind of nice if the price is reasonable. I was thinking I could unlock my phone and just buy a prepaid SIM while I'm there. The most I'll need is 15-30 minutes worth of talking. No texts, no data, no voicemail. Any suggestions on what to do and where to buy it? Or is a prepaid phone a better option? And will there be a way to kill data transfer once using that SIM? So yeah, kind of going several ways as I'm not really sure of my options and which route I should take. Any help would be great, thanks!