Apple i phone 4s black o2 mint condition 16gb*****not to be missed***** *

I phone 4s 16gb black! I am usuing this phone with an o2 sim card, not sure if it locked to the network or not!!! phone is in mint condtion as i have had a screen protector on from day 1 along with a silicone cover on the back!! Only selling due to an upgrade!!! NO SILLY OFFERS!! This is cheap at 350!!! come with box, earphones charger etc!!