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New Zealand's mobile networks have closed their 3G services. The practical consequence is that some phones and other devices no longer work properly, even if they can see a 4G network.
Devices that Stopped Working
Many consumers' handsets and devices will no longer make or receive calls, including emergency calls to 111, send texts, or use mobile data on One NZ, 2degrees, or Spark’s networks. Customers whose devices only work over 2G or 3G networks are now prompted to upgrade devices that rely on that technology.
According to the Telecommunications Forum, the last 3G network in the country was switched off by Spark on 31 March 2026. Phones and devices that relied on 3G can no longer make calls, send texts or use data.
The Forum's advice:
Text "3G" to 550 to find out how your phone is affected and what you need to do. Upgrade your phone to receive 4G data and Voice over LTE (VoLTE).
Why 4G Phones Can Still Fail
Some handsets that claim 4G support may not work as intended after the shutdown, if they lack voice-over-LTE (VoLTE) capability or carrier compatibility that allows them to make calls. Many devices, smartwatches in particular, can access 4G data networks but still fail at calls and texts, including emergency 111 calls.
Providers list a wider range of affected equipment:
The 3G shutdown could affect ALL DEVICES (not just older phones), including:
- vehicles that use SIM cards for display screens, navigation, telematics, internet, and more
- Tyre Pressure Monitoring Systems (TPMS)
- Electric vehicle charging station SIMs
- Satellite modem devices
- 3G-only mobile broadband devices installed in data-loggers, CCTV cameras, site-monitoring equipment, and more
- One NZ IoT SIM devices, including electricity meters on the wireless
2degrees says devices which may be affected by the 3G and 2G shutdown include:
- Safety alarms
- Specialised handsets
- Some older smartphones
How to Check Your Phone
Any customer with a 3G-only handset is advised to upgrade to a 4G-capable phone, while people with a 4G-capable handset who are unsure whether it can access Spark's 4G network are encouraged to contact the provider. To check your phone:
Text 3G to 550. You’ll get a reply from your mobile provider telling you if your phone will keep working, or if you’ll need to upgrade to a newer, 4G-capable model. Use a device checker from your mobile provider (if available) to see if your handset is 3G- or 2G-only. Note: this might not be available for all brands. Check your manufacturer’s product information or support site for further guidance.
What Else is Affected
Some specific devices beyond handsets may lose phone services as a result of the 3G shutdown, although One NZ, 2degrees, and Spark have not released comprehensive lists.
What to Do Next
Recommendations include: Checking your phone settings to make sure 4G and VoLTE voice calling is turned on. Updating to the latest software for your device, if possible.
If your device can no longer make or receive calls, texts or use data, it will need to be replaced or reconfigured. For alarms, trackers and other equipment, ask the company that supplied the device rather than your mobile provider.
