No online way,also no need to surrender it as it sometimes come in handy as address proof if you don't want to give other documents like voter id as proof. After the shutdown is over just go to your local bsnl office & submit an application to downgrade/convert your bsnl connection to Sulabh plan which gives only incoming calls & cost Rs.88/month(I am using the same).
I am on BSNL General Plan of Rs.353/-(including GST) only. Broadband line surrendered 3 yrs ago. That is why I switched to ALLIANCE Cable Broadband,thereafter.
The Plan which I am now,has Local and STD calls FREE throughout anywhere in India UNDER any NETWORK. You only need to pay Rs.353.00 per month that's all.
BUT MOST OF THE TIME ,LINE IS AT FAULT. MEANS NO CONNECTION. THE LINE MAN COMES AND REPAIRS,but they say on
that they are not being paid for nearly a year. They don't take any single paise from us. What they do is after 2~3 days of repair,they simply go to the distribution boxes along the streets/roads and disable the connection. I think at each repair they get some money from the BSNL office.
MY MONTHLY PAYMENT DUES FOR BSNL ARE UP TO DATE AND CLEAR.
Now BSNL tests my patience ,my mood,my annoyance, my psychology. Who cares!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Latest update: The optical fiber cable of ALLIANCE has just come near to my house and stopped at a pole just a few feet from my house. Then LOCKDOWN due to Corona has started,so work is suspended.They will provide a CPE box. BUT AFTER THAT THEY WILL CONNECT TO MY ROUTER or PC through RJ-45 cable only. No new modem( based for FTTH). Charging a one time deposit of Rs.1500.00