Will a basic phone still work after the UK 3G switch-off?

Q: How do I check if a phone supports VoLTE?

Look for 'VoLTE' or '4G Calling' in the manufacturer specification, then ring your chosen network, or check its compatibility checker, to confirm that exact model works and 4G Calling is switched on for your SIM. VoLTE depends on the network enabling it for your SIM as well as the handset supporting it, so a phone that supports it in theory can still need switching on.

UK 3G is switching off. A basic phone only keeps making calls if it supports VoLTE (4G Calling). Which Knock-listed phones do, and the cheap trap to avoid.

Knock·Knock

13 June 2026 6 min read

Yes, a basic phone keeps working after the UK 3G switch-off, but only if it supports VoLTE, the technology that carries voice over 4G. A phone can be “4G” for data and texts and still not support VoLTE, in which case it can silently fail to make or receive calls. Every basic phone Knock leads with is a 4G VoLTE handset. The trap is an old 2G-only phone, or a 4G phone where your network hasn’t switched 4G Calling on for the SIM.

What actually changed

3G is going, network by network. EE and Vodafone completed their 3G switch-off in February 2024. Three switched off its remaining 3G sites at the end of November 2025 (ISPreview). Virgin Media O2 began in April 2025 and expected to finish by spring 2026 (MoneySavingExpert). 2G follows later: EE aims to begin from May 2029 (ISPreview) and Vodafone during 2030, Three has no 2G network at all, and the operators have told the Government they will switch 2G off by 2033 at the latest (Ofcom).

The part that catches people out is voice. With 3G gone, calls move to VoLTE, also sold as 4G Calling. A phone with no VoLTE can drop to 2G where that still exists, with poorer audio, or simply not connect the call. So “it’s a 4G phone” is not the same as “it can still ring home”.

The honest caveat, before the table

VoLTE depends on two things, not one: the handset has to support it, and your network has to switch 4G Calling on for that SIM. Ofcom notes that even some 4G phones “might still need a software or settings update” so calls use the right network (Ofcom). So even where a spec says VoLTE, the safe move is to confirm 4G Calling is enabled for your SIM with the network before you rely on it. We can’t promise universal compatibility, and nor can a manufacturer.

Which Knock-listed phones support VoLTE

Read against the manufacturer specifications recorded in our data. We don’t lab-test phones; this is the published spec, with the network caveat above on every line.

Phone	Price from	VoLTE (4G Calling)	Verdict
Nokia 3210 (2024)	£79	Yes, spec lists VoLTE and Wi-Fi calling	Buy. The one we point most families to.
Nokia 8210 4G	£35	Yes, spec lists VoLTE	Buy. The cheaper sibling to the 3210.
Nokia 2660 Flip	£55	Yes, spec lists VoLTE and Wi-Fi calling	Buy. A 4G flip that closes with a snap.
Nokia 225 4G	£45	Yes, spec lists VoLTE	Buy. Plain, with USB-C charging.
Nokia 110 4G	£25	Yes, spec lists VoLTE	Buy. The cheapest with a camera.
Nokia 105 4G	£24	Yes, spec lists VoLTE	Buy. The honest floor, calls and texts only.
HMD Barbie Phone	£99	Yes, spec lists VoLTE	Buy for the child it suits. A real 4G flip.
Punkt MP02	£259	Yes, spec lists VoLTE	Buy if minimalism is the point.
Nokia 235 4G	£40	4G, our data does not assert VoLTE for this model	Confirm 4G Calling with your network before buying.
Light Phone III	£399	4G, our data does not assert VoLTE; ships from the US	Confirm VoLTE on your UK network first.
Refurbished iPhone SE (3rd gen)	from £89 renewed	Yes, a 4G/5G smartphone with VoLTE	A smartphone, so only if you’ve decided you need one.

Two lines are marked “confirm first” on purpose. Our data records the Nokia 235 4G and the Light Phone III as 4G without stating VoLTE in the spec field we hold. They may well support it, but we won’t assert what the spec in front of us doesn’t, so check 4G Calling with your network before you commit.

The hand-me-down and cheap-2G trap. The phone most likely to let a child down is the spare in a drawer or the bargain in a marketplace listing. An old 2G-only Nokia 105, the kind still passed around on parenting forums, has no 4G and no VoLTE, so once 2G winds down it can stop making calls. The fix is simple: buy the model with “4G” in the name, and ignore any “Nokia 105” listing that doesn’t say it. The same goes for a granddad’s old handset. If it predates 4G, it is on borrowed time.

What to do in two minutes

Look for “VoLTE” or “4G Calling” on the box or the manufacturer spec. Then ring your network, or use its online compatibility checker, and confirm that exact model works and that 4G Calling is switched on for the SIM. If you’re choosing a SIM too, our child-safe SIM note and where to buy a simple phone in the UK cover the rest. For the full line-up, see best simple phones.

We earn a small commission on marked buy links, through Amazon Associates and our retail partner programmes. Unmarked links are direct.

Common questions

Will a 4G phone definitely still make calls after 3G switch-off? Not automatically. A phone can be 4G for data and texts yet not support VoLTE (4G Calling), the technology that carries voice once 3G is gone. Without it, a phone can drop to 2G where that still exists or fail to connect a call at all. Check the manufacturer specification for VoLTE, then confirm with your network that the exact model works and that 4G Calling is switched on for your SIM.

Is the Nokia 105 safe to buy now 3G is off? Only the 4G version. The Nokia 105 4G that Knock lists supports VoLTE per the manufacturer specification, so it keeps making calls. The older 2G-only Nokia 105, which some forums still recommend, is the trap: it has no 4G and no VoLTE, so on most UK networks it will not reliably make calls once 2G is wound down too. Buy the model with 4G in the name.

Which UK networks have switched off 3G? EE and Vodafone completed their 3G switch-off in February 2024, and Three switched off its remaining 3G sites at the end of November 2025 (ISPreview). Virgin Media O2 started in April 2025 and expected to finish by spring 2026 (MoneySavingExpert). 2G follows later: EE aims to begin from May 2029 and Vodafone during 2030, Three has no 2G network, and all the operators have told the Government they will switch 2G off by 2033 at the latest (Ofcom; House of Commons Library, CBP-9959).

How do I check if a phone supports VoLTE? Look for “VoLTE” or “4G Calling” in the manufacturer specification, then ring your chosen network, or check its compatibility checker, to confirm that exact model works and 4G Calling is switched on for your SIM. VoLTE depends on the network enabling it for your SIM as well as the handset supporting it, so a phone that supports it in theory can still need switching on.

Related notes from Knock

Light Phone III vs Punkt MP02: which minimalist phone?

Light Phone III vs Punkt MP02, compared for UK parents. Maps and a monochrome screen at £399, or a keypad and encrypted texts at around £259.
Nokia 3210 vs Nokia 2660 Flip: which first phone?

The Nokia 3210 and the 2660 Flip compared for UK parents: price, battery, durability and the playground question. Which basic first phone wins.
Nokia 3210 vs Nokia 235 4G: which first phone to buy

Nokia 3210 (2024) at ~£79 against the Nokia 235 4G at ~£40. The £39 gap buys playground credibility and music. An honest first-phone comparison for UK parents.

All of the notes live at /notes. The site's recommended phones live at /best-simple-phones; the ninety-second picker that matches one phone to your family is at /which-phone; the kitchen-table conversation script is at /switching-kit; the research backing every claim is at /the-research.

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