1. Generally there is no lock n period for the loans especially when the borrower  wants this loan to be taken over by another bank/NBFC.

The original lender bank cannot refuse to provide this service.

Obtain a consenting letter from the existing bank along with the outstanding loan amount. Provide these documents to the new bank that you wish to transfer the housing loan balance. The new lender will then pay off the balance due to your old lender.

If the original lender bank is reluctant to oblige, yo may issue a legal notice through a lawyer and demand the desired details. 

2.  There is no such lock in period in case of transfer of loan from one financial institution to another. though some banks mandate minimum lock in period for pre-closure or repayment. 

There is no mandatory lock in period 

it all depends upon terms of contract entered into by you with the lender 

There is no RBI rule but depends on the individual agreement with your NBC bank

A. Yes, you can transfer your home loan to another bank any time after the lock in period ends for the same.

B. Generally this lock in period for a home loan ranges from 6 months to 1 year.

- However , you can enquire from the NBFC for the said period. 

There is no such lock in period 

However you can still check the loan agreement and other documents signed by you in favour of the bank for the grant of loan. Check if there is any stipulation to that effect. If it's there then it will be purely contractual. 

No statute imposes any lock in period for a loan 

Dear clients,
  Lock-in period clause says that tenant cannot leave rented property before specified period. In case tenant decide to leave the rented property before lock in period he/she needs to pay the rented amount for the lock-in period as specified in rent agreement.