Our Company have purchased A Nokia Mobile Set # 5800 D IMEI No 357988031394633 from Rajesh Telecoms on 04.10.09 with Invoice # 13716 / 138, Amount of Rs. 13500/. I am facing problem of (Mobile Hanging & Automatically Switch off) in this instrument. I have taken the extended warranty of this set from Dexter’s Digital Lab on 06-11-09 on the Payment of Rs.565/-. I have sent it many times to Nokia Service Centre, (Dexter Lab, Rohini) They have formatted my Moble 4-5 times but the problem is not solved. Then they changed it... read full review »