Lately, many iPhone 4 users wonder if there is a free unlock solution for baseband 4.11.08 or 4.12.01 and how to implement it on their terminal. Well, unfortunately the answer is still no. At the moment there is no free method to unlock these iPhone 4 baseband's, of course, if previously you have not performed an unlock with SAM.
This question emerged after Dev Team successfully released a downgrade solution for iPhone 3G/3GS with baseband 06.15.00. Unfortunately, this downgrade solution does not work on all iPhone 3G/3GS terminals and sadly it is not available for the iPhone 4.
Free Unlock iPhone 4 baseband 4.11.08 and 4.12.01 when will be released?
Another question that bothers many iPhone 4 users is if Dev Team will ever release a free unlock solution for baseband 4.11.08 and 4.12.01. Today, no one can give a sure answer to this question since there is a precedent. Some time ago, Dev Team firmly stated that will not release a downgrade solution for iPhone 3G/3GS, but fortunately they changed their mind and today we have a free solution, so keep your fingers crossed because anything is possible for the iPhone 4.
No one knows how long until a potential solution to unlock iPhone 4 will be released so you have to be very patient and confident. iPhone 4 with baseband 4.11.08 and 4.12.01 is the only iPhone on with you cannot perform a free unlock, the rest of the terminals having unlock solutions either through software or using Gevey cards.