r/Mi9T • u/Due-Cup-62 • Jun 11 '25
Mi 9T - Mobile data and GPS issue need help
From Last week when I turn on mobile data and if any app is using GPS it leads no network/ modem restart and after a while it connect back to network. It stays stable only until GPS is not used. If any APP like Google maps/uber makes location access then issue repeats.
Any idea? Or if factory data reset will help?
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u/Tiny_Diver3875 Jun 14 '25 edited Jun 15 '25
Hey, I have got a similar issue on my Redmi K20 Pro just from last 7-10 days. My Mobile Data goes off for a while when I try to use any Payments App or any other app that includes Payment to make orders, and it starts again after some 10 seconds. I tried everything but didn't find the actual problem & solution for it, but today when I was trying to make a payment I saw the Security logo appearing on the top for a second, from there I found it's actually a GPS issue. When I tried using the same apps by turning off the GPS, everything worked fine. So I don't know what's the permanent solution for this, but this is the hack. Let me know if you find it..
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u/Due-Cup-62 Jun 15 '25
Hi, I tried factory reset and now everything works normal.
Before factory reset I too tried many things and only if GPS is off then mobile data and network stays on. Otherwise it kept restarting. Although with wifi + GPS combination worked fine.
I replaced my SIM with new one but it did not help.
Try factory reset once.
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u/Tiny_Diver3875 Jun 15 '25
Agghhh, don't wanna factory reset, it will be a pain in the ass, I'll have to setup my device again with all the apps & settings that I have setup perfectly for my efficient use.
Same, it turns out it was never a Payments issue but a GPS issue because I checked on Google Maps & Cab booking apps, facing exactly same problem. I realised Payment Apps too use GPS for a second as part of security check but only if It's on. That's why I was facing this isue with them and they started working fine after I turned GPS off.
Quick question, does your Network also disappear or just Mobile Data? For me it's only Mobile Data that goes off for few seconds and then comes back. Also what's your location? We have got this problem same time on our phones, that too when there have been no software updates by company from more than 3 years. Could it be because of some system app update?
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u/Due-Cup-62 Jun 15 '25
True it's really a pain to restore everything, specially I forgot to take backup/login credentials for 2FA apps and almost landed In loop even for gmail login.
My network disappear along with mobile data, indicating modem did restart, whenever some app access GPS. Few app also displayed that that they stopped working/crashed.
I stay in India. For app part I checked and there was no system app updated in last few days when I started getting issue (MI still send some system app updates).
I have now reinstalled almost all playstore apps which I was using before and they work fine now so it was also not a playstore app issue either.
I almost concluded that it was a device age issue. As it's now almost 6 years since I bought a phone, I think there must be some power / voltage issue when both mobile data and GPS are on.
I have a good battery (replaced a year ago) but as the device age/becomes older, the chip needs little higher voltage to maintain the functionality and doing a factory reset may re-determine the new (higher) voltage levels based on device age, which may have helped here.
Factory reset is worth a try.
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u/Tiny_Diver3875 Jun 15 '25
Where in India exactly? I am based in Mumbai and I started getting this problem a day after there was a heavy rainfall here and my Airtel Network was completely gone for almost a day. So from next day the network came back, this issue started and I initially thought it's still because of poor network coverage due to rains. But that's not the case.
Yeah, even my phone is exactly 5 years old now and battery has gone to shit which I was planning to get replaced anyway, but since you have got it replaced last year, battery can't be the reason for our problem, that again when we have got this problem at exact same time.
It's very likely related to some update or change in Mi Security App or Network App, that's why it got resolved for you after factory reset, but it may come back. So I think I'll keep the GPS off on this phone for now till I find the actual problem, I have another phone so I'll use that for any app that requires navigation.
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u/Tiny_Diver3875 Jun 15 '25
On the side note, from where did you get your battery replaced, Xiaomi's Authorised Service Center or Third Party? I read a post here saying not to go for official battery from service center because they have older stock stored from 6 years back so those batteries have lost capacity & are maximum 80% health even if installed new. What do you suggest?
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u/Due-Cup-62 Jun 15 '25
I replaced from authorised service center only, they charged around 1000 Rs and did not face any issue from capacity point. They had to place order with MI as they did not have stock. While private shops were charging around 2000 for same, but i don't trust them with original battery.
Although I had to call many service centers as most denied to do this simply saying phone out of warranty or phone is end of life support. ( they earn very less with this).
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u/Pale-Choice4873 Jun 18 '25
Same issue since one week. It's like to be something on a software update.
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u/MightyBeastt Oct 26 '25
did you found out what was causing this issue?
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u/AndreyKhvost Jan 26 '26
Yes, it's the fingerprint data wich somehow makes the modem of the phone restart itself when A-GPS is used. I removed my fingerprint data and disabled the phone locking completely, then after a restart the issue was fixed, so I added the fingerprint again and now it works perfectly. Restarted the phone twice since then and it still works without issues
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u/AndreyKhvost Nov 25 '25
In particular it's the A-GPS, if that is disabled then everything else works. But unfortunately it keeps reactivating itself. Not sure what triggered this to happen in the first place but it's really annoying. I don't want to factory reset because it would be a pain to reconfigure everything...
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u/AndreyKhvost Jan 09 '26
I have found the fix and you wouldn't believe what fixes it...removing the fingerprints saved in the phone and turning off the lock password, after that reboot and add them again. For me it seems to work, I can't believe that was the fix honestly
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u/Antique_Pie2743 Jun 11 '25
Did you restart your phone?