As with all providers you need to make a chargeable call /text every 180 days or number may be reallocated.

I don’t use my phone often, but I certainly use it more than once every 180 day, but thanks anyway.

FYI - With iD Mobile It’s 4 months, not 180 days. 

Thanks, I did read that somewhere on the ID site, and that probably explains why the phone stopped working 10 weeks ago, but then I topped up and it stopped working a week later, and then I got a new SIM 8 weeks ago and now it has stopped working again, so something else is obviously causing the problem.

Hi ​@Beal 

Thank you for the message.

Can you try a mobile network reset and see if that resolved the issue for you. Here are the steps below.

Mobile network reset:
 
1.Press Settings.
2. Press General.
3. Press Transfer or Reset iPhone.
4. Press Reset.
5. Press Reset Network Settings.
6. Press Reset Network Settings.
7. Slide your finger upwards starting from the bottom of the screen to return to the home screen.
8. Restart phone

Michael Z

OK. I reset the network settings exactly as you instructed, and it’s still not working. I get the same message: “unable to make calls because you are out of credit”. Any other ideas? Thanks.

Hi ​@Beal ,

I’m really sorry the issue is still happening, I understand how frustrating this must be, especially when you have credit available. Thank you for trying the network reset.

Since you are using iD Mobile PAYG, there is no requirement to top up periodically as long as you have credit.
 

Please try these additional checks:

Restart your phone after the reset (if not already done).
Check Call Barring settings – go to Settings → Phone → Call Blocking/Identification and make sure calls are not blocked.
Make sure your balance is shown correctly in the iD Mobile app or by dialling the balance check code.
 

If the phone still says “out of credit” despite having balance, let us know so we can have this looked into further,

Lamiya

Hi Lamiya,

I’ve been diagnosing this issue with ChatGPT again, and this is the solution to the problem.

My line is being intermittently barred at network level. Calls, SMS, and data all fail simultaneously despite signal. This indicates a subscriber profile fault. Please rebuild the subscriber record across billing and HLR systems.

This is a known network condition, not a user issue.

To recap, after the problem first appeared, I topped up the credit (even though I still had a credit balance), and it fixed the problem temporarily (for about a week). I then replaced the SIM, and it again fixed the problem temporarily, (for about seven weeks). The reason the phone is working intermittently is: 

1. Account works normally

2. iD overnight system sync runs

3. One subsystem mislabels account as barred

4. Voice platform rejects calls

5. Error message says “no credit” (generic prepaid failure message)

When I previously topped up, the iD system:

• refreshed the subscriber record

• temporarily cleared the mismatch

That’s why topping up “fixed” it briefly.

When I replaced the SIM, it only refreshed:

• SIM authentication keys

• local provisioning

It did not fix:

• subscriber database errors

• billing-platform mismatches

• voice platform flags

The case lives in those systems.

In summary, the problem is a subscriber profile fault, so the subscriber record needs to be rebuilt across billing and HLR systems.”

Somehow my credit balance was charged £5.20 yesterday even though my phone is not working. Can someone at iD please explain what’s going on? How can I be charged when I am unable to make calls, send texts, or use data roaming? Please explain the charge?

And what is the status of the subscriber profile fault that I described above? Has that been escalated to the iD technical team?

Thanks.

UPDATE: Apologies. It turns out I got disconnected from our home WiFi (probably due to an iPhone update) and I didn’t realise I was disconnected, so I drained all my credit.

What this means is that mobile data was still working while phone calls and texts failed, even though I had a credit balance.

I just topped up £5 and the line is now working again.

This has happened before: topping up temporarily restores service, but after days or weeks calls, SMS, and sometimes data all fail simultaneously despite signal and prior SIM replacement.

This is not a handset or SIM issue. It appears the line is being intermittently barred at network level.

Please check whether my account is being incorrectly flagged as inactive or barred during system syncs and escalate to network provisioning / second-line technical support to investigate and permanently fix the issue.

Thank you.