Apple iphone 4 32 GB not signal coming -

hi I bought this phone from gumtree three month ago it was working fine and work with 02 network but now its still working but i cant call anyone but mobile sim internat still working i spend 350 for this phone anyway ......give me a good offer email me and keep ur phone number and i will call u back thanks Second hand Apple iphone 3G 8GB factory unlocked in black, comes in generic black box with charger and USB cable. Some scuffings/scratches but otherwsie in great condition. Fully working and unlocked to any SIM network. Fantastic bargain price! LG VIEWTY KU990i, OPEN TO ALL NETWORKS INC. 3G. PHONE COMES WITH CHARGER. THE PHONE HAS 5 MEGAPIXEL CAMERA, ALSO HAS A FRONT CAMERA. IT HAS MANY MORE FEATURES. GOOD CONDITION, FULLY WORKING ORDER. 35 O.N.O CALL ME: 07870124621 OR EMAIL ME. NO TEXT MESSAGES PLEASE Apple iPhone 3GS Smartphone - O2 Offered for sale in very good condition. Few very minor surface scratches to screen. Choice of new back covers Reason for sale: Upgraded so surplus to requirements Hello ive got the brand new samsung glaxy s3 white 16 GB orange network for sale.. I want to sale as i need some urgent cash.i will give you the copy of proof of purchase.phone comes with.if you need more info please dont hesitate to contact me.. 07855534737 regds