How to fix iPhone gps with baseband 6.15.00?

as we know baseband 6.15.00 is not downgradable

to test gps just turn wifi off and take sim out

but whats the best way to get it working?

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some people claim iOS downgrade will help but any proven confirmed fix?

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in theory it should work..the problem is from the configuration for an ipad wifi vs iphone. There were issues with wifi etc when ios 4.x came out, so in theory changing your ios to something before that may help. Its only really affects bootloader 5.9,5.8 seems to be pretty ok.

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