Can you unlock an iphone 4 on 5.1.1?

I just bought an iphone 4 from buddy here in Canada, its Locked to fido i have called places that unlock phones and they say there's no unlock for iphone 4 5.1.1 I just wanted to come on here and see if this is true?

Only baseband 1.59.00 can be unlocked.
all others can only be unlocked by the original carrier.

You need a imei unlock get one from applenberry it's $150.00 use coupon code imeibuddy for 30$ off you will get a email saying they did it then plug the phone in itunes and click sync then you should be unlocked so your phone will be unlocked and next time buy a phone on baseband or modem firmware 4.10.01 because you can use a gevey sim form the same website i gave you for around 20.00$

You can go this trusted unlock iphone guide:
http://intellecttoday.org/

It will be helpful for you.

Yes it is true, ignore the scam sites that needs pay to unlock.