Sim card lock

[sam006]

guys

can somebody tell me in depth what the sim card lock actually does?

Thanks

[deserttopping]

i think if your sim is replaced, your phone will not work. antitheft device.

[bugmenot1]

if you drop in a different sim card from another carrier the G1 will ask for a unlock code if you enter a wrong code 5 times it will sim lock your phone. you will not even be able to use youe original car either. you will need to call tmo for and unlock code

[sam006]

I have a dev phone and use it on the at&t network

[mater]

Hi,
Well basically i have lot sim card to whom i can lock through give pin code which will SIM card company provide to us and any handset i will put my Sim it will ask pin code.