After the unlock for 3G and 3GS was released a few weeks ago – another issue was discovered – now GPS does not seem to work properly after the reported battery draining issue and a fix by @sbingner.
This has been acknowledged by @Musclenerd in responding to a question by his followers on Twitter. These hardworking folks are working on a fix, so let’s hope this can be resolved soon.
If you cannot wait, you can opt for baseband chip replacement service or hardware downgrade. If you prefer DIY, you can purchase a baseband chip here.
Editor's note: learn more by reading our ebook on starting your own iPhone repair & unlock business
UPDATE: We have heard from iPhone 3G users that they were able to restore the GPS functionality after downgrading to iOS 3.1.3 (still with baseband 6.15.00).
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baseband can't be downgrade
To kick this thread back in……………. is there any expected fix for lost gps after 06.15.00 ?
i have a iphone 3gs,model mc135ll version 5.0(9a334) modem firmware 06.15.00 and its not reading my simcard no wifi no carrier can you help me to get them back working please i live in the bahamas and with my phone like that its very frustrating my last i phone had the same problem when i upgraded it and i took it to a technician he told me my phone memoryboard had burn out which he lied to me what a ripoff some poeple are so can you help me please thankyou
it can be a logic board issue… do you have that 'no wifi, no bluetooth and no IMEI' issue?
There is a new tool that will enable you to downgrade baseband and fix iPhone 3GS GPS :) GPS FIX 06.15 finally :)