I doubt that much money can be made from repairing cordless phones in Uttar Pradesh or anywhere.
But there are plenty of places that repair cellular (mobile) phones - call one or two and ask them for advice... you never know...
DAKSH COMMUNICATION & MOBILE REPAIRING CENTRE
OPP.KRBL RICE MILL VILL.BISNOLI, G.T.ROAD, CHHAPRAULA, G.B.NAGAR, Greater Noida, Uttar Pradesh 203207, India
Phone: +91 95406 32045