Many people have had their phones blocked from logging in to certain game or reward apps.
One app that I have helped countless people with would be the Shopkick app which runs on iphones, ipads, and the android platform.
This app gives you points for walking in to stores and points for scanning items within the store. You then turn those points in to gift cards at Starbucks, Bestbuy, Gamestop, etc. Many people have found that you can use FakeGPS and a couple of websites to scan the specific items, however people aren't careful enough and the shopkick server flags them to be banned.
Enough about that particular app.
I'm willing to help anyone who has had their phone banned by such an app. These apps look at your device id, imei, serial number, and beyond. So trying to open a new account results in that account being banned as well.
The process for android platformed device will require rooting, installation of a specific app, and configuration of the app.
For BTC or alt coins I will personally help you every step of the way through email, screen shots, or skype.
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Use my link to join the shopkick experience & receive 25Kicks: http://get.shopkick.com/hydrogen17867
Use this link for bacrode scanning: http://shopkick.brakertech.com
Use this link for walk-in sounds: http://www.ceploitips.com/2011/03/shopkick-walk-in-files.html-----------------------------------------------------------------------------------------------------------------------------------