Hello all, I'm in the USA but am traveling on vacation to Ireland soon. It's my understanding that if I try to use data roaming it will be crazy expensive, and even AT&T's international roaming plan would still be very expensive just for voice and texting. Some articles/posts I've read suggest putting the phone into Airplane mode and turning back on WiFi and just living like that. I've never unlocked an iPhone and only jailbroke one once a while back, so I'm rusty on that. But I've read some positive posts in another thread here about swiftunlocks.com for unlocking the phone. On to my questions... 1) Do I need to jailbreak my phone before I can unlock it via swiftunlocks? 2) Will this unauthorized unlock cause me any trouble with my continued AT&T usage? What about if I have to bring the phone in to AT&T or Apple to deal with an issue? 3) Once unlocked, can I just find a SIM card somewhere after arriving in Ireland and save a lot more money by using that versus using something like AT&T's international roaming plans/add-ons? 4) Will I be able to use affordable data with one of the SIM cards/plans in Ireland? 4) I have an iPhone 5, but my wife and daughter have 4S's. Any issues with either of those models?