If you are using SAMSUNG mobile and if you are finding any difficulties with your handset, you can call at SAMSUNG customer care number (of India). Contact number is given bellow. You can call at any one number out of four bellow.
(a) 3030 8282 (Prefix local STD code)
(b) 1800 110011
(c) 1800 3000 8282
(d) 1800 2668282
[ This phone support is available for 24 hrs a day all 7days a Week]
If you are unable to solve your problem by phone support, you can submit your complain in written through email also at THIS LINK.
There is another option- get support for SAMSUNG mobile through chatting online from support team at THIS LINK . The timing for chat is 11:00 am to 6:00 pm from Mon to Sat.
Before contacting Customer Care, it is better to read the manual of your SAMUSUNG Mobile.