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The short answer
To stop a Nigerian line being barred, it needs some revenue-generating activity at least every six months: the NCC counts calls made or received, SMS, data and USSD. As at October 2026, Airtel Nigeria's published roaming bundles start at ₦4,500 for one day; you may not need roaming at all if a relative in Nigeria uses the SIM, or you use a park or keep-my-number service.
What the NCC counts as activity
The NCC's consumer page on churned lines defines an active line as one with revenue-generating activity: calls made or received, SMS, data or USSD. Six months with none can lead to partial barring (incoming calls only), and 12 months to the number being churned and recycled. The page does not discuss roaming, so ask your network whether activity while roaming in the UK is counted the same way.
What roaming costs, from the one network page with prices
Airtel Nigeria publishes roaming bundles that include outgoing calls to Nigeria and the visited country, incoming calls, SMS and data. The UK is on its list of eligible destinations. As at October 2026:
| Airtel bundle | Price | Includes |
|---|---|---|
| 1 day | ₦4,500 | 250MB data, 10 minutes, 10 SMS |
| 10 days | ₦10,000 | 1GB data, 15 minutes, 15 SMS |
| 30 days | ₦25,000 | 3GB data, 25 minutes, 30 SMS |
Airtel says unused benefits do not roll over, that you can buy for someone else on *789# and check usage on *789*4#, and that some destinations need VoLTE, mobile data and data roaming turned on for calls. We did not find published UK roaming prices on MTN's or Glo's pages, so check their apps or customer care for today's figures.
Ways to keep the line active, from cheapest effort upward
1. Leave the SIM in Nigeria
Many people leave the SIM in a cheap phone with a trusted relative, who sends one text or buys a small data plan every few months. No roaming cost at all, and codes can be read to you if needed. The trade-off is control: whoever holds the SIM can receive your bank codes. Only do this with someone you would trust with your account.
2. Receive a call while roaming
The NCC lists received calls as activity, and Airtel's bundles include incoming calls. Whether an incoming roaming call outside a bundle is charged, and whether your network counts it, depends on the network; ask before relying on it.
3. A short roaming bundle twice a year
Example: two of Airtel's one-day bundles a year at the October 2026 price is ₦4,500 × 2 = ₦9,000. That buys two days of normal use, including any OTPs you need, and covers the six-month test twice.
4. Park or keep the number
The NCC page says a line can be parked "for a nominal fee for a year", without giving the fee. Airtel offers prepaid customers Keep My Number on *494#, which needs enough credit on the line; the page gives no price. Ask each network for the cost and how long it lasts.
5. Dual SIM or eSIM
A dual-SIM phone lets you keep your UK line and Nigerian line in one handset, which makes the occasional text easy to remember. Moving the Nigerian number to an eSIM means it never needs a physical slot; see moving a Nigerian number to an eSIM.
Which option suits whom
| Your situation | Option that tends to fit |
|---|---|
| You visit Nigeria at least twice a year | Use the line on each visit; no roaming needed |
| You rarely visit but have a trusted relative at home | Leave the SIM with them and agree a text every few months |
| You need bank codes while in the UK | A short roaming bundle when you need it, or an eSIM in a dual-SIM phone |
| You will not use the number for a year or more | Ask about parking or Keep My Number before the six-month mark |
Whichever you choose, the date matters more than the amount. One small activity inside each six-month window is what the NCC rule looks for, so put a reminder in your calendar rather than relying on memory.
What to check first
- Which network the line is on, and whether it is prepaid or postpaid.
- The last date it had any activity, so you know where you are on the six-month clock.
- That the NIN link is still in place; unlinked lines face their own disconnection risk.
- Whether your banks still send codes to this number. If not, you may decide the line is not worth keeping.
If you are already past six months, see reactivating a barred line from the UK. To keep the line safe from fraud, read SIM swap fraud warning signs.
Where Pryme fits
A Pryme account is protected by an authenticator app and a transaction PIN rather than SMS codes, so it keeps working whether or not your Nigerian line is live.
Questions people ask
How long can a Nigerian line stay inactive?
The NCC says six months without activity can lead to partial barring and 12 months to the number being churned.
Does roaming keep my Nigerian SIM active?
The NCC page does not mention roaming. Ask your network to confirm that roaming calls, texts or data count as activity under the NCC rule.
How much is Airtel roaming in the UK?
As at October 2026, Airtel's bundles were ₦4,500 for one day, ₦10,000 for ten days and ₦25,000 for 30 days. Check the Airtel page for current prices.
Can I keep my Nigerian number without using it?
The NCC mentions parking a line for a nominal fee for a year, and Airtel offers Keep My Number on *494# for prepaid lines. Ask your network for the fee.
Sources
- NCC Consumer Portal: All you need to know about churned lines (30 Jul 2026) · accessed Oct 2026
- Airtel Nigeria: International roaming · accessed Oct 2026
- Globacom: NIN linking · 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.