[Q] {Q) Sim Problems

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I was one of the lucky ATT users to get an unlock code from ATT. The phone works perfectly with a US Tmo sim card. However, the problem began when i started putting in other sim cards. When i put in a Cellcom (u)sim card (Israel)i got a message "com.android.phone has stopped". I was unable to do anything because the error kept popping up. So i switched to an Orange (again Israel) (u)Sim. THe phone turned on without any errors but its not finding any networks. I try to go to the Network settings but the "Default Setup" option is not available.
Can anyone help me with this issue? I am going overseas on Monday and need to use one of these Sims.
(BTW- I am currently in the US but im assuming that wouldnt be an issue in trying to setup a sim card)

Thank you

I'm pretty sure if you put an Israel sim card in in the united states that it will not find the networks because Israel use a different frequency than the united states .

The type of sim card should have nothing to do with the frequency. That is determined by the type of phone you are using.

Originally Posted by Rad_Fishy

The type of sim card should have nothing to do with the frequency. That is determined by the type of phone you are using.

Sorry, no. The frequency is determined by what the cell tower for that carrier is running. For instance United states GSM is 850/1900. Israel is GSM 900/1800.

I'm using orange which is 850 also. Anyways why would I still be locked out the settings for changing the network info?

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