To receive OTP (One Time Password) for netbanking while you are abroad using your India mobile number on roaming, you have a few options:

Option 1: Retain your Indian network SIM card

• Keep your Indian SIM card active by recharging or receiving calls when you are abroad.
• This way, you will receive the OTP SMS on your Indian mobile number [1].
• However, this option may have additional maintenance costs, monthly rent for postpaid SIMs, and may require an additional handset to maintain the number [1].

Option 2: Register your abroad mobile number with your bank

• Some leading banks like ICICI, SBI, and Yes Bank allow you to receive OTP SMS on your abroad mobile number without changing your account to an NRI account [1].
• You will need to download the registration form from the bank's NRI banking section, fill in the details, and attach necessary documents [1].
• If you are from countries like the UK, USA, Canada, Australia, Singapore, and UAE, you can search for a local postal address and send the form via local mail. For other countries like Germany, you can visit the nearest Deutsche post and send the form to the Hyderabad address mentioned on the bank's website [1].
• It may take around 1 month for your number to be updated, but you can call the bank's customer care number to expedite the process [1].

Additionally, if you are unable to receive the OTP on your mobile number, you can contact your bank and ask for alternative methods such as OTP devices or using the bank's mobile app to generate OTPs on your handset [3, 7].

Learn more:

1. Journey in my world......!!: How to get an OTP (One time password) / URN (Unqiue Registration Number) when you are outside India
2. Receive text during International Roaming? ICICI URN? | TechEnclave - Indian Technology Community
3. Receiving Bank OTPs | Expat Forum For People Moving Overseas And Living Abroad