I am traveling in kenya for 3 months and the o2 data rates are £6/mb opposed to safari.com pay as you go 8KSH per MB. If you take in to account that there is approx 118 KSH per £1. Texts re £.45 or 10KSH. THe only thing I have lost by unlocking whilst I am out in kenya is visual voicemail. Apart from that I am using my iphone like I would in the UK. With out being stung with roaming charges.