[PapalosC]

Hey all,

I just had a quick question. I've gotten quite fed up in recent weeks with AT&T, and I've decided that I'd rather not continue my service with them. However, I also don't want to lose the functionality on my iPhone.

The Apple support site says that I should just remove the Sim card, but my question is this: will this cause problems when I try to update my phone in the future to 4.0? Or beyond?

I just want the most painless transition to a non-AT&T data plan capable iPhone.

Would "unlocking" be appropriate in this situation?

Thanks in advance for your advice!!!

[rdiddy_25]

In order to upgrade to 4.0 thru iTunes it will require a valid sim card but until then you'll be good. If u ever need to restore, you'll need a valid sim card to do so.

[PapalosC]

Okay, I guess what still confuses me is the "active sim" part. Does that mean ANY active AT&T sim card that I can stick in, or is there an iPhone specific one?

Do you understand where I'm going with this? Can I buy a new (crappy) phone, and then when I want to upgrade just pop in that sim, upgrade, and switch back?

[mg48]

It needs to be a sim with an iPhone plan. I borrowed a friends last time I upgraded.