Could I put a simple mobile sin card to my HTC from ATT
It appears this can be done on most phones, however can be quite technical. The basic user of a mobile phone is unlikely to manage this successfully without assistance.
If the Galaxy handset has been unlocked - yes.
No. The sim card would not be inter-carrier compatible.
Some cell phones are controlled with a SIM card. You may want to see if your AT&T SIM card will work a T-MOBILE phone.
Yes as long as the phone is att and has a sim card slot
An AT&T sim card will not work in an T-Mobile phone as it is locked to particular carrier itself... If you want to put your AT&T sim in your T-Mobile phone you can try unlocking your phone
Try taking it to a att, verizon,t-mobile etc. store and see if they can give you a replacement
if it's unlocked I think so, if not, procedures all over internet
If your phone plan includes mobile to mobile calling it does. If you're using prepaid it generally won't unless your on the $1 a day mobile to mobile plan.
yes, but i wouldn't do that. It should work on any phone including t-mobile and att
yes it is even though i don't have ATT or T-mobile my cousin switched and he's doing really good but its up to you
Yes, provided your ATT phone is SIM unlocked.