Upgradeable iOS for Iphone 4 iOS4.1, baseband 02.10.04, using gevey ultra sim

[emy_77]

I bought a jailbroken Iphone 4 iOS4.1, baseband 02.10.04, using gevey ultra sim in July 2011. I want to upgrade to the latest upgradeable version. May I know what is the latest version that I’ll be able to upgrade to? Your help is greatly appreciated

[emy_77]

Post below seems to show that, with baseband 02.10.04, upgrade to iOS5.0.1 will result in unlock to not to work if using gevey:
Unlock won't work!? Gevey Sim

The post below also shows iPhone4 with gevey cannot be unlocked with any baseband whatsoever:
[How To] Check if you can Unlock

Below is summary for iPhone 4:
Baseband Firmware Unlock:
1.59.00 4.0/4.0.1/4.0.2 Yes (Ultrasn0w)
2.10.04 4.1 Gevey Sim
3.10.01 4.2.1 Gevey Sim
4.10.01 4.3.X Gevey Sim
4.11.08 5.0/5.0.1 None

Hope soon, there will be a solution for this. Or should I just give up hoping?