Recently started considering switching to Straight Talk to save $40/mo but realized I'd need to unlock the device to do so.
Requested and received an unlock code from AT&T, but have not applied it as of yet.
My question is:
1. Can I use an old Tracfone sim during the unlock procedure
2. Most importantly, when I unlock the phone, will it still function the same? Will the unlocking cause a hard reset, or change my connection settings, or wipe out my contacts and other data?
Thanks in advance for any thoughts.