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The short answer
If you lose the SIM registered with your bank, the quickest fix is usually a SIM swap to get the same number back from your network, which keeps your alerts, OTPs and USSD banking working with no change at the bank. If the number is gone for good, you update it with each bank, usually by branch visit or a signed form with valid ID, because the number on your BVN record can only be changed at a branch and, under a 2026 CBN rule reported by ThisDay, only once.
First choice: get the same number back
Your phone number is linked to many things at once: each bank account, your BVN, your NIN, your email recovery and messaging apps. Changing it everywhere is slow. Recovering it with a SIM swap is usually faster and avoids touching your bank or BVN records at all.
MTN's SIM swap page lists what you need: the number must be registered, you need your NIN or virtual NIN, and you may be asked security questions such as your last recharge amount and date, frequently dialled numbers or the year you activated the line. You buy a new SIM and complete the SIM Replacement (Welcome Back) form at an MTN shop. MTN also describes a proxy swap for people outside Nigeria, which needs NIN for both people, photo ID, an affidavit and an indemnity letter. Airtel's eSIM page says blocked lines are recovered by SIM swap with valid ID at an Airtel shop.
When you need a new number on your bank profile
If the old number cannot be recovered, update each bank. A new number matters because whoever eventually holds the recycled line could receive your alerts and OTPs.
Route 1: branch visit
- Take a valid ID. Access Bank's account management form lists a driver's licence, voter's card, NIN slip or international passport; for diaspora customers a passport with visa or notarised permit.
- Bring your account number, BVN and the new SIM in a working phone.
- Complete the bank's customer information update or phone number update form. Access Bank's account management form has a Phone Number Update section asking for the new number and ID.
- The bank may send a test SMS or OTP to the new number before confirming.
Route 2: in the app or by form
Some banks let you change your phone number inside the app if you can still log in and pass a check such as a facial scan, debit card details or a token. Others accept a signed form and ID by email from the address on your profile. Look under Profile, Settings or Account Management in your app, or ask the bank's official helpline which route it accepts. Expect the app route to fail if the bank requires an OTP to the old number.
The BVN record
Your BVN also carries a phone number. NIBSS states that updates of customer information are done physically at bank branches. ThisDay reported in March 2026 that a CBN addendum allows phone number amendments on a BVN only once. Because of that limit, choose the new number carefully: pick a line you expect to keep for many years and register it with your NIN. See which number your bank should have.
What to check first
| Question | Why it matters |
|---|---|
| Can I recover the old number? | If yes, a SIM swap avoids all bank changes |
| How many banks and fintech apps use that number? | Each one needs updating separately |
| Is the new line registered with my NIN? | NCC has directed networks to bar lines not linked to a NIN, as NAN reported in July 2024 |
| Do I still have access to my email? | Some banks send confirmations or accept forms by email |
| Did any unusual transfers happen while the line was gone? | Report them at the same visit |
If you are abroad
Nigerians outside the country often lose a line simply by not using it. A branch visit is not possible, so start with the proxy SIM swap route if your network offers one, which recovers the number without any bank change. If the number is gone, ask each bank which remote route it accepts for a phone number change, such as a signed form and ID sent from your registered email, or a visit to a branch on a trip home. Do not send ID documents to anyone who contacts you offering to update your details; only use channels you found on the bank's own site.
While you wait
- Ask each bank to block digital channels or put a hold on new device registrations until the number is updated. Our guide should you block your BVN? lists bank block codes.
- Rely on email alerts if they are on; see why both alerts should be on.
- Keep the police report or network block reference if the phone was stolen; some banks ask for it.
Where Pryme fits
Pryme login codes come from an authenticator app rather than SMS, so a lost line does not by itself cut you off from your account or hand codes to whoever holds the SIM. To update the phone number on a Pryme account, use the official contact channels; see also security.
Questions people ask
How do I change my phone number on my bank account without the old SIM?
Visit a branch with valid ID and your account details and fill in the phone number update form, or use your bank's app or email route if it accepts one without an OTP to the old number.
Can I do SIM swap and keep my number?
Yes, if the number is registered to you and has not been recycled. MTN asks for your NIN or virtual NIN and may ask security questions; you fill in the SIM Replacement form at a shop.
How many times can I change the phone number on my BVN?
ThisDay reported in March 2026 that a CBN addendum allows phone number amendments on a BVN only once, and NIBSS says updates are done at bank branches.
What happens if my old number is given to someone else?
They could receive SMS alerts or OTPs meant for you, so update every bank promptly and ask the bank to block digital channels until it is done.
Sources
- MTN Nigeria: SIM swap · accessed Oct 2026
- MTN Nigeria: Keep My Number · accessed Oct 2026
- Access Bank: Account Management Request Form · accessed Oct 2026
- NIBSS: Bank Verification Number (BVN), modified Oct 2026 · accessed Oct 2026
- ThisDay: CBN building secured, stable financial system with stricter BVN rules (21 Mar 2026) · accessed Oct 2026
- NAN: NCC orders immediate reactivation of phone lines barred by telcos (30 Jul 2024) · accessed Oct 2026
This article is general information, not financial, legal or tax advice. Products described are provided under the terms on this site and are subject to regulation and eligibility.