Locked out of your own Indian bank account because the OTP goes to a dead Indian SIM. Here is the way out.

Start with why it happens. Your Indian bank sends every one-time password to the mobile number on your account record, and for most NRIs that is still the old Indian number. Abroad, that number is often dormant: the SIM has expired, roaming is off, or the Indian carrier's SMS simply does not land on a foreign network reliably. Many Indian banking systems were also built assuming an Indian number, so a foreign one either was never added or does not always get the message.

The reason you cannot just work around it is regulation. The Reserve Bank requires a second factor of authentication on digital payments, and in practice that second factor is the OTP sent to your registered number. So for the online transfers and logins you actually need, the code is not an optional convenience the bank can waive. No working registered number means no logins, no transfers, no card payments and no UPI. You are locked out of your own account, and it is by design.

Here is what makes it maddening. The obvious fix is to change the registered mobile number. But changing it is a sensitive action, so the bank wants to verify it is really you, and the usual way it verifies is by sending an OTP to the number already on file, the dead one. Or it asks you to walk into a branch. Either way, the thing you need to fix the problem seems to require the very access you have lost.

It is a real chicken-and-egg, and it is why so many NRIs give up and rely on a relative's phone or an old saved password. That is neither safe nor necessary. There are ways to change the number that do not depend on receiving an OTP on the old one, and there are ways to make sure you never get stuck here again.

The cleanest modern fix is to put your actual foreign number on the account. For NRE and NRO accounts, most Indian banks now let you register an international mobile number and send the OTP there. It is not universal and reliability varies between banks and even between their own systems, but the direction is clear, and for a genuine NRI account it is the setup that matches your life.

The same shift reached payments. The Reserve Bank and NPCI have opened UPI to NRIs using an international number linked to an NRE or NRO account, currently from twelve countries including the United States, the United Kingdom, the UAE, Canada, Singapore and Australia, across a set of approved banks. So an NRI in those countries can run UPI on their foreign number without an Indian SIM at all.

Ask your bank's NRI cell two specific questions: can you register your international number for OTP, and is your account enabled for UPI on an international number. The answers decide how much you still need an Indian SIM.

For all the progress on international numbers, the single most reliable setup in 2026 is still boring: keep one Indian SIM alive, on a plan that does not lapse, with international roaming enabled. An OTP to a live Indian number that is roaming reaches you almost anywhere, and it sidesteps every bank system that quietly still assumes an Indian number.

The practical version: pick one Indian number to be your banking number, put it on a long-validity plan so it does not deactivate from disuse, enable roaming, and register that number with every bank, the tax portal, your mutual fund folios and your demat. Then, where the bank supports it, add your international number as a second registered number. With both on file, you are reachable whether you are carrying the Indian SIM or not.

An Indian number that lapses is the root of most of these lock-outs. Carriers deactivate numbers after a stretch of no use, and once the number is gone, so is the OTP path. Guarding that one number is cheaper than any of the fixes for losing it.

If you are already locked out, you change the registered number without needing an OTP on the old one. The exact route depends on the bank, but these are the ones that work.

Net banking or the app, if you still have login access, often lets you change the registered mobile using your debit card details and ATM PIN rather than an OTP to the old number. An ATM, if you can reach one on a visit, can update contact details for some banks. A video-KYC or video-call verification, which more banks now offer, lets an officer confirm your identity live and update the number. A signed change-of-details request, on the bank's form, with your passport and attestation, couriered to the branch, is the paper route when nothing digital works. And, if your bank permits a power-of-attorney holder to change contact details, a trusted person in India holding your registered power of attorney can do it at the branch, though several banks restrict this because that number controls your OTPs.

Call the NRI cell first and ask specifically which of these your bank supports for an NRI abroad, so you set up the one that fits before you courier anything. The goal is a working number on the account; once that is done, the codes start arriving and the account is yours again.