[krishnanr14]

I had just recently purchased the Nokia Lumia 920 with Windows 8 operating system. I had ordered and gotten two backup phones with Windows 7.5 (both Samsung Focus and Samsung Focus Flash) and one question I have is.....Suppose my Nokia Lumia went bad (in this case either broke or had some sort of damage), and I decide to switch my sim card from the Lumia to the Samsung Focus phones, will I have to contact AT&T regarding the fact I moved the Sim to another type of Windows phone that's branded by AT&T? It's only from Windows phone to Windows phone, not any other phone operating system, so hope I can just experiment, and also use my Lumia properly.

Thanks

[inteller]

no, that's the primary advantage of SIM cards. You switch when YOU want to, not when the carrier wants you to.

[tk-093]

I think the Focus and Flash use full size SIM cards and the 920 users a microSIM so you'd need an adapter I think.

[George Ponder]

Both responses are spot on. AT&T won't need to be notified and you'll need to get a SIM card adapter to use the microSIM adapter for the Samsung Focus Windows Phones.
You can find them on Ebay, Amazon.com or here at the WPCentral Store.

[Jeebus137]

I've been told that not matching the IMEI number of your device to your account will cause data to drop out periodically, which I can attest too. You would want to notify AT&T of that probably.

[inteller]

never ever had that problem. If you have that problem you should call in a service complaint, not grovel and apologize to them because their IMEI sniffer software doesn't work properly.