[Q] Cannot get LTE to work - G3 Q&A, Help & Troubleshooting

I've got an unlocked T-Mobile (model 851) G3 that I'm using in Canada on the Koodo network. For quite a while now the LTE mode doesn't work. It connects to the tower, I see LTE up in the taskbar but I can't connect to the internet in anyway.
It used to work, but has not for several weeks. I've just disabled LTE and have been using 3G mode instead, but I'd like to try and resolve this if I can. It used to work when I first got the phone, but I think it stopped working around the time I upgraded to the most recent firmware upgrade. I can't swear to that, but I'm pretty sure it was at the same time.
For what it's worth, I rooted the phone as soon as I got it with purpledrake. I restored the phone to normal to receive the update then rooted again, this time with the brute force method (I forget the name of the app).
Any ideas?
Thanks..

Related

[Q] To keep connection I have to switch between GSM Only and GSM Auto (PRL). Why?

So, I've been using the LS980 on MetroPCS fine using Justin's ROM, then the CM11 T-Mobile made for this phone - for a while at that. A poster commented that will the Telinfo app, I could use any ROM. Trying, I never got a signal. If I did, it would last for a few hours.
I went back to stock and tried again - using the LS980 CM11 ROM for Sprint, I've been able to keep a connection the longest. Using the Telinfo app, I'll be on GSM Only, then it would go to 'E' or 'Emergency Calls Only', so then I switch to GSM Auto (PRL), and I'll be back to normal speeds. Usually once to twice a day I have to do this.
Any idea why? Did I somehow screw up the radio? As I said, I went back to stock and it picked up the Sprint network fine (though I couldn't use it with no Sprint service).

Tried FoxFi and now having SIM problems? (Verizon)

Not having a good morning. I have unlimited on VZW that I've carefully protected. I've had a G4 for a while but I keep using my G2 because it's rooted and I use the hotspot. Had a bad experience previously where I finally bricked a G2 so that scared me out of the root and rom hobby, so I've tried to leave my G4 alone. Constantly using the G2 for internet meant my G4 spent a lot of time in a drawer, though. Kept hearing word that FoxFi actually worked fine on the G4 and figured it would be nice to use my G4 more often if I could just manage to get hotspot from it. So I'm off for the holiday, I download FoxFi and then switch my SIM over to my G4 as I've done many times. I forgot that FoxFi lets you try it free at first with a time limit, so cool, I try pressing "Activate WiFi Hotspot" and it seems to hang for a few seconds before telling me connection not available.
Now on the G4 notification bar I have a SIM icon with a "?" and it flips back and forth between 1x and 3G. If I put the SIM back in the G2 it doesn't have the ? icon but it does the same thing going from 3G to 1x. Neither phone actually tries to tell me that a SIM isn't inserted, they are seeing the card and they recognize when I take it out. It just suddenly isn't working. Can't load web pages, can't receive phone calls. WTF happened to my SIM?
Yup.... my Verizon page now tells me I have 1.6GB of allowed data. Somehow trying Foxfi finally got my old SIM deactivated. Awesome.
That makes no sense, call get a new SIM and make them aware of the problem with your data plan.
Foxfi has stopped working with Verizon Wireless since atleast 5 days ago:
http://www.droid-life.com/2015/11/2...ail&utm_campaign=Feed:+DroidLife+(Droid+Life)

G4 H815 doesn't stick to LTE - apn okay, lp&mm stock kdz already flashed

Hello!
I have a big problem with my G4 (H815 version, Germany) beginning with the switch from CM13 to the (stock based) Genisys 3.2 ROM. I've tried to fix it for three days now but without success. It doesn't stick to LTE anymore like it should do and did before. After a reboot it does sometimes connect to LTE but after switching back from wifi or airplane mode it's showing the "no signal" icon. Then it takes some seconds until it reconnects to the mobile network but now just to 2G or 3G. From this point it's not willing to reconnect to LTE, even not through the manual RAT-selection. "Force LTE" using the hidden menu then results in no network connection. However, after restoring my EFS-partition-backup with TWRP (from a time when it was working perfectly) it's connecting to LTE directly after boot but only once and only until you toggle wifi or go offline - like described before. After the next reboot it will mostly connect to 3G and then maybe switch to LTE sometimes or not.
Of course I have checked, deleted and restored my APN multiple times, I have also recovered to a stock V20b and V10d .kdz using LG UP in refurbish mode. Unfortunately even on the fresh and untouched V10d install it shows the same strange behaviour. Restoring the CM13 backup (including EFS partition), which has worked perfectly before, shows the same network bug now.
My sim-card is still working perfectly in my other phones. It still connects and reconnects almost instantly to LTE in my old S4 in places where the G4 did the same but struggles now.
I have even tried the cdmatool which is used to unlock additional LTE bands. I didn't change anything but it does show all usual LTE-bands which are needed for my provider.
Does anyone have an idea what I could try next? I'm living in an area with much better LTE than 3G connection and paying for a quite expensive LTE contract so a working LTE is very important for me. If I don't get that to work again I would need to replace my just over one month old G4 :crying:
Many thanks in advance for your answers
f-rouz
Meanwhile I have also tried another simcard. Still no LTE
i have the exact same problem, well, almost. no unlocked bootloader, but when i first got the phone i root injected the system.img and flashed away, thought everything was fine. now it just doesn't reconnect to 4G. well, at home at least. on my S4 i get 4 out of 5 bars on 4G, with the G4 i get 2 or 3 bars out of 5 on 4G, so the signal isn't great but good enough. i live in hastings (a town) and went to brighton today (a city) where the signal is max 4G, and the device does pick it up. but as soon as i go through a 3G area to home, it doesn't reconnect. have tried flashing original system.img back, upgrading to MM 6.0 after factory reset (via LG bridge), then downgraded again to V10c via LGUP - factory reset before the downgrade, no joy, still the same.
when you say you have forced LTE in hidden menu, did you try this - enter 277634#*# in dialer and go to field test > modem settings > lte band selection and select the band for your operator, which can be found on 'wiki europe lte bands'. there were two bands for my provider (three UK) and band 3 was what i wanted. i can now switch to 4G but it's a pain having to this every time i come home ( i use my phone for home internet via tethering).
worst part is, having refrained from unlocking the bootloader to save the warranty, i phoned LG today to send it back as faulty and explained i could switch it to lte band 3 via the hidden menu and they told me my warranty was now invalid as had OPENED the hidden menu (they told me this after taking my imei). so if anyone reads this and phones LG for a repair, don't tell them you have accessed the hidden menu if you have done what i did.
think i'm just gonna sell the phone, make a palpable loss and buy another one, as i love the phone
Wow, I haven't thought that from LG. I feel like I've searched the whole internet already and nobody has a solution to this problem. I'm about to send my G4 back to Amazon (or sell it otherwise), hope the best and get myself a Oneplus Two because the G4 seems to be too *****y from the development standpoint. I've never had a situation like this with my previous Samsung phones since 2009. I will miss this camera though. And the NFC and the wireless and fast charging capability... the G4 is a nice phone nevertheless...
Edit: And yes, I have tried the "277634#*#" hidden menu, although it isn't accessible through this code on MM any more (you need a terminal command to start this).
Have you tried limiting it to 4G/2G in hidden menu? Mine also have a similar problem in Lollipop in that it is very aggressive in dropping to 3G. That worked for me. Phone doesn't drop to 2G much provided you have decent LTE coverage.
Now I'm on Marshmallow and not rooted, thus cannot do the same. Though it seems to be sticking to LTE a bit better than before.
I have tried that but it doesn't work. As I don't get any network connection wenn forcing LTE only, forcing LTE/2g results in 2g only.
My G4 still doesn't want to connect to LTE so I have ordered a S6 now... As I still have no idea what was causing this I just can't risk that happening again. It has been a short journey for my first LG and me and I really liked my G4 actually... Bye G4 community
you just needed to flash the stock modem, most likely
Unfortunately, it isn't that easy. That was of course the first thing I did (and not just one time)...

Samsung s4 mini (i9195) connection problems (mostly working on edge, no 3g/H/LTE)

Hi guys,
I have this problem with my galaxy s4 mini: a few days ago, soon after rooting the phone with the procedure found in this forum, mobile network began to work only on edge, and sometimes there is no service at all.
Therefore, I tried to check the sim in another phone, and it works good, I did a hard reset, and nothing changed.
Then, at this point I flashed the rom with a stock firmware, I flashed the modem, but mobile network wasn't working yet, (it was still working on edge).
Thus, I decided to flash the rom with a CM 13 (snapshot), and here something happened !
In fact, LTE/H/3g have begun to work, but only for short periods of time when in use (looking some stuff on the internet), like 10-20 minutes, and only when the battery is almost completely charged,
at least until it reached 60%, then, when it drops below, it begins to have the usual connection problems.
Since I've rooted the phone, I haven't installed any app, I put a sd card in it, another thing is that, when I use mobile network (internet or apps) the phone becomes really hot.
If someone could figure out what could be the problem, I'd really appriciate your help,
Thank you.
I have smae issue on my s4 mini gt-i9190,
only 2g works....
wcdma only not working......
after searching for selecting networks manually its says: selected network (!!!) unavailable....
also when try to make a call on wcdma only mode it says: not registered on network....
buts works fine on 2g mode...
I want get back 3g but how?!
any help appreciated!!
Hey guys... ther's a GS4 mini version with LTE and another without LTE.
Are you sure you flashed the correct version (LTE)?
If you install the incorrect recovery (non-lte) it will not even allow you to flash the correct files.

Network connection drops and squeeze for assistant stops working

Just checking to see if I am the only one having these issues.
I have the 3 XL on ATT, and I randomly have no internet access over mobile data, even though the notification shows LTE and decent signal strength. Screenshots attached to show what I'm talking about. This has happened about 4 or 5 times since I received the phone a few weeks ago. I went to ATT and got a brand new sim, thinking that my old sim may have been going bad, but that did nothing. Only way to get the mobile network connection working again is to reboot the phone.
I have also noticed a few times that the squeeze for google assistant feature will stop working, and I have to reboot the phone to get it working again. Anyone suggestions? I am leaning towards just doing a factory reset this weekend, but I would like to avoid that if possible.
Thanks
dont know about the edge squeeze assisit not working (i use edge sense module and app) but i have to reboot or go into airplane mode to get data to work when i get the x. maybe using a different apn would help... im on att too
AT&T issues
This is now a problem for me. I have to put my phone in airplane and then back to lte at least once a day in order to get mobile data working again. I'm not really sure if it's a network issue or a phone issue.
Issue for me here too, but I'm in Australia on Telstra network.
Sent from my Pixel 3 XL using Tapatalk

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