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The update is easy to fix. 1.Like danieltf said download xvi32 and open it 2. locate and open the File( BNGI0218v710hex) which you can download from this page 3.click on search then click text string and type in 7.1.0 then click on text -> hex and hit Ok You will see the 37 highlighted on the left (Hex) and on the right you will see 7 highlighted ( Text) 4. Click on 31, next to 2E ( 37 2E 31) and click edit and overwrite string 5. click on text string and type 2 then click on text -> hex and hit Ok 6. Save it and transfer it to your phone Hope this helped, New around so I tried to be thorough.

Good work

GG