If I update my unlocked iPhone 4, will I lose my unlock?

I recently bought an iPhone 4 and was told it was unlocked and used to be on T-mobile. I'm now in Canada and set the phone up with Fido. Everything works great, except I have noticed it is running 4.3.5 ios which stinks because it's missing tons of features and I can't download many apps. I really would like to update the phone to the newest IOS, but I'm pretty sure I will lose the unlock (I don't really know how it was unlocked and neither does the person who sold it to me, it's not jailbroken). Anyway, if I do update it I'm wondering what the best way is to unlock it again? Can anyone help me to find a good site or place to look whicj will give me step by step instructions on how to unlock an iPhone for on the newest IOS so that I can use it on Fido again?

Iphone4 is a top smartphone. It should be unlocked firs and the updatea?! Also it should be compatible with the new system and reading its manual is a great help?! Good try!

  • Will i lose the notes on my iphone if i update it? I lost my phone so as a replacement i got my Dads old phone which is fine but he wants the notes from his old iPhone.anyway i know how to do it using mobile me but the problem is it's an incredibly outdated iphone and doesn't have the option it would have if i updated it. So if i was to update the phone would i lose my notes?
  • Will I lose anything on my iPhone if I make IOS 6.1.3 update? I'm hesitant in whether to download the latest software update on my iPhone 4S. I'm Afraid I lose my phone content, apps, pictures, and contacts… Now some people said that I'll lose then and others said no. Can any experienced person tell me please if I'll lose them or not?
  • IOS 7 UPDATE: Can I still update my unlocked iPhone? So I went to a friends phone retail store he unlocked my iPhone through a company wich gives u the code to unlock and then he connected it wit Net10 (AT&T). Pretty sure it was a legal unlock MY QUESTION IS: can I still update my iPhone 4S to IOS 7 even though my iPhone is unlocked? Because if I do I'm worried my carrier settings wuld erase and I wouldn't have a line with Net10 any more.
  • In the middle of an iPhone update and my iTunes won't recognise my phone in order to continue to update. Can I stop the update now? Neither the computer nor iTunes are recognising my phone and I've been working on his for an hour, I want to stop the update so I can go to bed, how can I do that? It's only at the stage where it has a symbol on the screen of the iPhone cable linking to iTunes