It worked for me. I ran all the above steps on my unlocked T-Mobile Samsung Galaxy S4. Its really amazing. It should also be noted that after the completion of the above steps, you will have just EDGE data. In order to change it to 4G, you will need to select 'LTE/WCDMA/GSM(auto connect)' under the network mode. Thanks to 'melovelynn' and than you Captaincoffey for reposting. ITS WORKING!!!!!!