Warehouse Mobile sim not co-operating

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Wannabe Geek
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#3458895 4-Feb-2026 23:52

With my old black and green warehouse mobile sim I didn't get the option for VoLTE (using an Oppo A54s). I bought a new blank sim from the closest warehouse store with the new red packaging with the cartoon wolf mascot and got my number swapped to it from their customer care and VoLTE showed up as an option immediately so I think for whatever reason the sim DOES make a difference.

skelly500

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#3459373 6-Feb-2026 17:46

Success! It was indeed the sim causing the problem. Bought a sim swap from The Warehouse (second store, the first one denied selling such things), rang customer care, woman in a far-off country said it was the phone. Told her it wasn't and insisted that the sim needed swapping. Got handed over to a local who did the swap, and it all worked.

Happy days.

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#3459374 6-Feb-2026 18:04

skelly500:

Success! It was indeed the sim causing the problem. Bought a sim swap from The Warehouse (second store, the first one denied selling such things), rang customer care, woman in a far-off country said it was the phone. Told her it wasn't and insisted that the sim needed swapping. Got handed over to a local who did the swap, and it all worked.

Happy days.

@skelly500 Doing the SIM swap corrected something on the core network side

Good the issue is sorted

inperfected

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#3460845 12-Feb-2026 08:30

I have the same issue.
Have a warehouse sim. It works on a Samsung s23+, but not on S10.

I've rung them, and they've said the Sim isn't set up for 4g on this phone, so need to go and get a blank sim replacement to put it on.

A little odd if I'm honest, considering we only bought the sim in Oct 24!

quickymart

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#3460854 12-Feb-2026 08:51

inperfected:

I've rung them, and they've said the Sim isn't set up for 4g on this phone, so need to go and get a blank sim replacement to put it on.

Sounds like the person you spoke to doesn't know what they're talking about 🤔

inperfected

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#3460858 12-Feb-2026 09:01

Agreed entirely... However, a fresh blank sim does seem like the next step to try, so not opposed to attempting that.

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richms

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#3460866 12-Feb-2026 09:31

Heads need to roll at warehouse mobile for letting this happen with the well known 3g shutdown. Totally inexcusable.

Richard rich.ms

Andib

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#3460911 12-Feb-2026 10:24

There is no such thing as a "3g only sim", The CSR you spoke with is using that an excuse to get you off the phone as they're out of ideas for troubleshooting.

Warehouse mobile began in 2015 at which point 2Degrees already had 4G for a year so even if 3g only sims were a thing (they're not) why would they roll them out when 4G was already available.

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KiwiSurfer

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#3460940 12-Feb-2026 10:51

Andib:

There is no such thing as a "3g only sim", The CSR you spoke with is using that an excuse to get you off the phone as they're out of ideas for troubleshooting.

Warehouse mobile began in 2015 at which point 2Degrees already had 4G for a year so even if 3g only sims were a thing (they're not) why would they roll them out when 4G was already available.

Agree but also wonder if those older 4G SIMs weren't provisioned for VoLTE somehow? 4G is not the same as VoLTE.

Andib

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#3460968 12-Feb-2026 12:00

KiwiSurfer:

Agree but also wonder if those older 4G SIMs weren't provisioned for VoLTE somehow? 4G is not the same as VoLTE.

This is going off topic a bit, but a sim is only used to negotiate access to the mobile network. Provisioning of services / features is all done on the network side.

At a very high level the sim simply contains a unique ID number (IMSI) & private key, when you turn your phone on these are sent to the mobile network which says yes or no to connecting.

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GeneralMidi

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#3461071 12-Feb-2026 20:49

KiwiSurfer:

Andib:

There is no such thing as a "3g only sim", The CSR you spoke with is using that an excuse to get you off the phone as they're out of ideas for troubleshooting.

Warehouse mobile began in 2015 at which point 2Degrees already had 4G for a year so even if 3g only sims were a thing (they're not) why would they roll them out when 4G was already available.

Agree but also wonder if those older 4G SIMs weren't provisioned for VoLTE somehow? 4G is not the same as VoLTE.

From the web:

To enable VoLTE functionality, the device SIM card must support identity and authentication features tailored for IP-based voice services. Traditional SIMs used in 2G and 3G networks are insufficient for VoLTE. Instead, VoLTE relies on more advanced SIM variants, particularly the IP Multimedia Services Identity Module, which is a logical application on the universal integrated circuit card (UICC).

The SIM stores specific credentials used by the IMS (IP multimedia subsystem), which is the core system managing VoLTE call sessions. These credentials include the IP Multimedia Private Identity (IMPI) and the IP Multimedia Public Identity (IMPU). The IMPI uniquely identifies the subscriber within the IMS domain and is used for authentication. The IMPU acts like the user’s phone number in the IMS and is used for routing SIP-based calls.

There was an articulate and seemingly knowledgeable csr when I called who said an early batch of Warehouse mobile sims didn't support VoLTE. Clearly a number of us had our issues fixed when switching to a new sim card... So maybe there is some truth to it being the sim being too old? Just a thought.

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#3461085 12-Feb-2026 21:01

Well that articulate and seemingly knowledgeable csr pulled the wool over your eyes

VoLTE is a handset and network feature

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#3461090 12-Feb-2026 21:26

@GeneralMidi I understand you don't know my back ground

Taking a guess a batch of early WHM SIM cards IMSI range was added to a block list so they could not access VoLTE and calls would fail over to 3G / CSD

Now when WHM customers are doing a SIM swap they will have a new IMSI that is not on the VoLTE block list and of course they can now make VoLTE calls

If you provided me the Ki String for your WHM SIM card and gave me root access to SparkNZ / OneNZ network AuC I could make that SIM card work on those networks

ZMAC was insert ki and ZMAO was checking the AuC for the Ki

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#3461093 12-Feb-2026 21:49

Example

The IMSI range stopped say a VodafneNZ MNVO (mobile virtual network operator) customer from calling 777. Yes the subscriber was attached to the Vodafone NZ network

The MVNO would have its own IMSI range for its SIM cards and the core network had coding in it if a SIM card with the MVNO IMSI 5300123xxxxx called 777 then the network would play the message ' The number you have dialed is not valid please check the number and dial again '

insane

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#3461100 12-Feb-2026 22:19

Let me add some additional info I've learnt so we can give the CSRs and store staff a bit of a break and solve the mystery. Linux you were partially on the right track towards the end.

The batch of early SIM cards were blocked on device, which is why newer devices still getting updates work, and older devices no longer getting vendor updates are needing to get a new SIM card. So WHM's simple get a new SIM (from a different range) advice was correct, and isn't something they could control from the network side.

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