Can i convert a sidekick(Lx) to work with a cingular/at&t sim card?

[MR_SHIRLEY_MANSON]

And if I can unlock it to work, how do i unlock it?

[D-I-V-A=ME!!]

Nope Only T Mobile

[geeth]

hi you can convert your sidekick lx mobile from one network to another by unlocking it .to unlock it codes are the best solution .to get the codes visit simpleunlocking here they ask you the network name to which your mobile is locked then the imei number of your mobile .finally they will send you the codes to unlock your mobile along with the instructions about how to use the codes in your mobile.