will this unlocked phone work on my network?

ok will this phone http://www.walmart.com/catalog/product.do?product_id=6537407 work on my att network ps its a gophone acount and dont say that it wont work with a gophone cuz the gophone sim cards works in my dads 3 work phone and my sister's 2 phones and they normal phone and i will be swiching to uscellular later this year and i know that they use different techolgies but will it work on uscelluar and att or does it just work on one but its just a normal unlocked phone from no just 1 cellphone company

If your phone is GSM unlocked phone, it can be compatible with any other sim cards internationally . but not compatible with CDMA sim cards . If your phone is not unlocked properly, use unlock code to unlock it . You can get it from any of the online vendors like SuperUnlockCodes.com to unlock it .