hi...i'm not sure yet to which network it's locked ,but I paid to someone on ebay for an imei check and i'm waiting on that .
however i want to do the unlocking with btc\ltc  ,so i'll update here once i hear from the ebay guy or if you can check and quote me  ,that will be great .

will escrow of course .

UPDATE : Iphone Locked to : UK O2 Tesco .
Update 2 : found an offer on amazon.co.uk ,so i bought a gift code from pock.io which wokred great .