When the iPhone 3G and 3GS ultrasn0w carrier unlock came out 2 weeks ago, it made everyone excited and liberated thousands or probably millions of iPhones.
UPDATE: Forget about installing iPad baseband on your iPhone, make it officially unlocked without hacking or jailbreaking here.
Everyone knows that it was made possible through the use of iPad’s baseband version 6.15.00. iPhone 3G and 3GS’ original basebands 5.14.02 and 5.15.04 were left in the dark, and probably can never be unlocked, ever.
So, if you plan to implant iPad’s baseband 6.15.00 into your iPhone 3G or 3GS, you may want to read and consider the following:
- There is no software downgrade procedure available once your baseband has been upgraded to 6.15.00. However, @MuscleNerd is currently working on this.
- If you have a baseband 6.15.00, you will NOT be able to restore using the original firmware. That means iTunes will give you an error message if you try to restore it directly from there. You can only do it via a custom or ‘cooked’ firmware created with redsn0w or other tools such as sn0wbreeze.
- GPS will not work properly (or not working at all!) on your iPhone due to this baseband although a fix is said to be on the horizon.
- You will void any Apple warranties as they can easily detect this baseband if you bring it in for service.
- The resale value of your iPhone may be lesser due to the above, that’s if you intend to sell it at one point. Otherwise, this is not really an issue.
- UPDATE: iPhone 3GS produced after week 28 of year 2011 is not compatible with iPad baseband. Read here.
If these do not bother you at all then you are ready to unlock your iPhone. You can follow the steps here. Alternatively, we provide hardware unlock by replacing the baseband chip which contains iPhone’s original baseband 5.13.04 which is already unlockable. This will eliminate most of the issues above.