State Bank Of India [SBI] — Requesting to update my registered mobile no.

To
The manager
SBI bank
RAIT(Branch)
Sir,
Sub: Requesting to update my registered mobile number.
I have a SBI account with your concerned bank. My account number is ([protected]). I had given the mobile number [protected] When i opened the SBI account here. Now i want to change thismobile number with my present number [protected] as i don't use my old mobile number registered here. As i face some difficulties to know my account debit/credit, I request here you to update my mobile number with my new number in record.
Thanking you,
Yours truly,
Pankaj kumar