Is it a good idea to unlock my jailbreak and unlock my iphone?

[Mario]

I have an iphone 3g w/ 3.1.2 firmware, and i wanna update it. I read that the update takes away your jailbreak and unlock though (running on tmobile) , and since i bought it jailbroken and unlocked i don't know the risks. Is it worth it? Can you a give me a link for the download if it is (and the steps too please)? Thanks in advance

[vicecaptain]

You can get the jailbreaking guide for an iPhone 3G from www.iphone3gjailbreakguide.com and for unlocking you can unlock your iPhone 3G very safely through remote unlocking method. It is the easiest and affordable method too to unlock an iPhone. You can get the remote unlocking from www.Mobileunlocksolutions.com This is a trustworthy source to get your mobile unlocked. You need not worry about unlocking method. You will get complete step by step unlocking instruction guide from here. All the best mate.