Tried putting 3G iPhone SIM CARD in 2G iPhone?!?

[amitdoc2b]

Has anyone tried this, and does it work? I was considering grabbing a relative's 2G iPhone as backup since they won't be using it now that they also got a 3G iPhone like me. But before I have them mail it to me, I wanted to make sure that the 2G iPhone works with the 3G iPhone's SIM card.

Thanks!

 

[jaglad]

Tried it and it didnt work. Annoyingly O2 didnt need to change my sim card as my existing one from my first iphone worked and I got 3G, but as soon as my old card deactivated and had to use the new one, when I put the sim card in my old iphone and got Sim error.

It did help me make my mind up though, as I was going to keep my old iphone as I still prefer it to the new one.

 

[DenniZ]

Tried it and it didnt work. Annoyingly O2 didnt need to change my sim card as my existing one from my first iphone worked and I got 3G, but as soon as my old card deactivated and had to use the new one, when I put the sim card in my old iphone and got Sim error.

It did help me make my mind up though, as I was going to keep my old iphone as I still prefer it to the new one.

Sim error ?, Although that older iPhone should accept that sim card (My current iPhone has a 3g o2 sim card in it, it works fine)

Will confirm it when I get my 3g iPhone though.