help with unlocking mms messaging

[mishoneybeez]

Ok I straight talk . I am using an AT&T samsung galaxy s3 .... on the byop program.... I using my sim card from my old zte merit phone ...cause I can't afford AT&T compatible one... I was told to download tweakker n it unlocked my internet perfectly but I can't send or recieve mms messages what did do wrong?

 

[rick_evelyn]

Ok u dont need to unlock the phone I as well am using the att s3 on straight talk do u have a micro sim from straight talk or did u cut ur own from the old one what u need to do is look on straight talks website and find the apn settings for an att compatible sim card and follow the settings works like a charm for me if have anymore questions dont hesitate to ask thanks I have been using it for several months with no problems and if u cant find the apn setting on the site then let me know I will post what mine r

Sent from my SAMSUNG-SGH-I747 using Android Central Forums

 

[rick_evelyn]

Ok go to settings then more settings mobile networks access point names and then click ur bottom left menu botton then select new apn and change these settings
Name straight talk
Apn att.mvno
Proxy proxy.mvno.tracfone.com
Port 80
Mmsc http://mmsc.cingular.com
Mms proxy 66.209.11.33
Mms port 80
Only change these settings and when ur done click on ur bottom left menu button again and save apn then restart ur phone and u should be good to go let me know
Sent from my SAMSUNG-SGH-I747 using Android Central Forums