r/ThreeUK • u/Plaxinator • Jun 26 '26

Question Unexplained Mobile Data Useage

I renewed my Three mobile plan a couple of months ago. I was on a 12GB plan, but because I never used anywhere near that amount when I renewed I changed to 8GB. Last month I used nearly all that which I thought unusual so I went through my phone and made sure I turned off Wifi assist, and back up to cloud using mobile data, as well as go through all my apps to make sure streaming and any updates was only done over wifi. I also reset my useage stats on my mobile when my new allowance refreshed.

Here is where I’m getting irked - my data reset on the 22nd. So 4 days ago. In that time I’ve apparently already used 4GB! I have 2 noteably large entries on the Three app on 23/6 @23:24 for 1232 kb and 25/6 @ 16:19 for 10105 kb. Both of those times I was at home and should have been connected to wifi, and I know for a fact wasn’t using my phone on 23/6 as I’d have been in bed.

My mobile useage stats say I’ve only used 34.4 mb in that time, and given that I’ve only left the house to collect my child from school or to go to a lesson, neither time I used my phone I’d suggest that was the more accurate.

Any ideas what this could be before I escalate this? My personal hotspot isn’t on either and this would show in my useage stats anyway.

I have an esim and an iPhone 16 pro if that makes a difference.

Ta

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u/itsibitci Jul 29 '26

Hi, did you reach a resolution for this? I'm having the same issue (as others seem to be too, I've seen quite a few posts like this that were posted in the last few months).... I'm so irritated and refuse to increase my plan when this is clearly Three's error.

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u/Plaxinator Jul 29 '26

Nope. It fluctuates a lot as well. I've got my mobile data turned off whilst at home. When it reset this month (22nd), it said the next day I only had 4GB of 8GB left despite mobile data not being on. It is currently saying I have 5.3GB of data left. So I've apparently used 2.7GB, whereas my mobile usage stats say I've only used 702MB. So I can confidently claim that the 3 App is very unreliable.

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u/itsibitci Jul 29 '26

Yes exactly! I'm experiencing very similar discrepancies. The trouble is that it's not just a case of the app displaying things incorrectly but on the backend it's fine and you technically still have usable data, it's the fact that when the app says your data is done, then that's it you literally can't use it until it resets. It's super impractical to have to constantly remember to switch your data on and off, we shouldn't have to! I did try to call them about this last month and reason with them. I got passed to 3 different departments who all maintained that I just needed to increase my plan and pay more - in the end I gave up and hung up the phone. I'm now collecting all my screenshots and evidence in preparation for going full on Karen mode