How to get my iphone unlocked? - 1

Hi
I have an Iphone 4 on ios 6.1.3 (GSM) on 3 network in the United Kingdom. I have checked on 3's website and it says it will cost me £15.32 to get my iphone factory unlocked. Is there no other way to get it unlocked for free?

I was thinking if I should get a semi untethered jailbreak on my iphone and then go to cydia and download Ultrasn0w which should then unlock my iphone but I'm not100% sure if this will work?

Another option is I can downgrade from 6.1.3 aswell seeing as I still have my SHSH blobs saved, so I can downgrade to 4.3.5 and then upgrade it to 6.1.2 from there I can do a full untethered jailbreak and also install ultrasn0w. Will any of these options work for me or am I stuck with having to pay £15.32 for the unlock?

You can get it unlocked cheaper in store… Esp.small local shops… Also try posting your details (imei etc) at dhakamobile and they will give you the nck code or spck code etc.

Permanently unlock the iphone here: http://gsmunlocklabs.com/unlock-iphone/

You can unlock your Iphone 4 locked to T-mobile using remote unlocking method. If you are intersted in this method of unlocking visit http://www.onlinegsmunlock.com/apple-iphone-4/rs16wp9/. Here they unlock your iphone at reasonable price