Here’s a quick guide to unlock your iphone 4 running basebands 03.10 and 04.10 that are not factory unlocked. Currently, there is no software unlock for the basebands. There are 2 methods available for your unlock.
1. Buy an official unlock
You could do a quick google search for this as quite a number of sites offer online unlocks of the basebands at fairly affordable prices. I however cannot guarantee the validity of a number of those sites so you need to be careful.
2. Use the Gevey Sim
The Gevey SIM unlock uses a SIM interposer which sits between the baseband hardware and the SIM card itself to perform the unlock procedure, rendering iPhone 4 basebands 01.59.00, 02.10.04 03.10.01, 04.10.01 all unlockable.
The Gevey SIM is a much thinner SIM that must be placed on your regular SIM card so that both fit into the phone’s SIM holder. It must stay in place at all times for the phone to stay unlocked.
It’s a pretty reliable unlock method however it can be inconvenient at times especially in areas with poor network coverage as you have to repeat the unlock procedure if the signal is lost for more than 2 minutes.
Here is the step-by-step guide to using the Gevey sim unlock
Step 1: Dial 112 then hang up after 2 seconds
Step 2: Wait 15 seconds, then switch your phone to airplane mode
Step 3: Wait until you get this message ‘No Sim Card Installed’
Step 4: Once you get that message, switch off airplane mode. Your device will probably show “Sim Failure” for a couple of seconds and then should unlock by itself.
Let me know if this was helpful. I know a couple of readers have been asking for this on my twitter account. Oh, and by the way, my iPhone 4S is due to arrive this week. I’m already having pre-excitement jitters! Keep checking Mobility for the first Nigerian review of the iPhone 4S and Siri!