Hi! I want to tell u how to unlock Lumia 1020 AT&T or any operator sharing internet, the only thing u need to do is
1.- You need to configure ur Nokia Lumia 1020 AT&T in USA COUNTRY, and this is in Settings, Language+Country and there in Country Select UNITED STATES, and behind u will see a bottom that says: Needs to Restart, u will need to restart it.
2.- Go to Market and search this app: access point
access point | Windows Phone Apps+Games Store (United States)
3.- You can install app froms USA, like Pandora too.
4.- When finished now u can change your country ( for example, im from Mexico) and restart again (if ur from USA dont do this step)
5.- At last u need to go SETTINGS and search ACCESS POINT (Punto de acceso en espanol) and u need to configure ur DATA SETTINGs and MMS settings for ur operator (APN TELCEL, ROGERS, T-Mobile, etc..)
6.- When u finished u need to ACTIVATE that profile
7.- At last the only thing u need to do is to go to Tethered Wifi or Conexion Compartida and activate it, this is a thing u need to see:
When u activate Tethered, i will see how many persons can connect to ur Nokia Lumia 1020, if says 5 persons, u hav AT&T locked and u will not share ur internet, BUT if says 8 persons, congratulations!! u unlocked tethered connection!!!
And thats all! i do it with my Nokia Lumia 1020 At&t and im from Monterrey and works!!!
if u need help just send me an email:
sidemzuga@hotmail.com
See ya!