Develop Bugs

Not connecting to 3G EVDO, only 1xRTT

Hi, I was hoping someone here may be able to help me out with this problem. Last week I had a weird issue where my GPS signal stopped working, text messages and phone calls weren't coming into the phone. I've since been able to correct that issue with flashing to a clean Sense based ROM, and updating the profile and PRL, but now I can't seem to pickup 3G EVDO signal, only 2G 1xRTT..
My phone is(was) rooted and flashed with Calkulin's EViO 2 v1.77, most current radios. I thought maybe something got messed up, and since 1.8 was out, I flashed to that. Same issue, updated the radio from his package, same thing. Then I thought, ok, maybe something with this rom is messed up(unlikely, but I was grasping at straws at this point), so I flashed to a different rom, think it was sprint lovers.. same thing. Flashed to CM7, same. Unrooted and flashed back to stock, took it into Sprint, which they did a hard reset and told me since it shows the 3G icon in the top bar, it is on 3G and working fine. This is ofcourse bull**** since the Evo shows that 3G icon even if its on 1xRTT signal..Sprint tossing out wrong info, shocking I know. I've used Antennas and OpenSignal apps to show that it is indeed connecting to the 1xRTT signal. Downloading anything on the phone is ofcourse slow too, I've had google maps updating now for about 15 minutes, and it is 5.86MB.
Would anybody have some suggestions of what I can try to get the 3G radio working again?

Anybody have a suggestion of what I could try here? I've changed my PRL to the Verizon one, which gives the same results. Still having the same problem.

ya its calkulin's 1.8. the new extended mobile data menu hack has a messed up default that sets it to evdo only by default, messing up everything else. switching roms doenst help. go back to calk's 1.8 and type in the dialer ##3282# select view only and make sure mode of operation is on automatic.

Internet not working.

For the past week and a half, I've had internet issues when I'm on 3g. It works fine on wifi. I've switched between ROMs, kernels, modems, etc. I'm currently on Goodness with the MA6 firmware modem AIO and the anthrax kernel. I've tried updating the profile & prl. I have between 2-4 bars of 3g and yet it still gives me the webpage not available sign. I tried clearing the cache/ fixing the permissions. But the internet simply won't work. I'm in Maryland, between Baltimore and Frederick. What could the problem be? Maybe the phone itself is defective or Sprint's network died in my area?

I'd see if they're doing work i that area. I know in areas of Baltimore 4G is there, I believe. You could try using build prop tweaks ect for signal if you wanted.

Zin0 said:
For the past week and a half, I've had internet issues when I'm on 3g. It works fine on wifi. I've switched between ROMs, kernels, modems, etc. I'm currently on Goodness with the MA6 firmware modem AIO and the anthrax kernel. I've tried updating the profile & prl. I have between 2-4 bars of 3g and yet it still gives me the webpage not available sign. I tried clearing the cache/ fixing the permissions. But the internet simply won't work. I'm in Maryland, between Baltimore and Frederick. What could the problem be? Maybe the phone itself is defective or Sprint's network died in my area?
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http://forum.xda-developers.com/showthread.php?t=1815580&page=3
http://forum.xda-developers.com/showthread.php?t=2154344
Misery loves company.
The 2nd post is a thread I started regarding the same problem. The first post is to a thread I thought could help me. I tried some things mentioned in there but none of them worked. Then someone posted in the thread who is having the same problem.
Here's what I've been running into and what I tried. I am on FreeGS3, Anthrax kernel, and recently updated to MA6 when I started having problems. I use a battery saver so my internet connection turns off when my screen is off. I started noticing a week or so ago that when I woke up my phone, the 3g icon would appear but only the up arrow flashed. The download arrow wasn't doing anything. I would toggle it off and on and eventually get it to work. I'm in the Raleigh-Durham area and we are just starting to get LTE. My 4G works whenever I go through 4G areas and my wifi works. I have restored a working backup, wiped my phone, flashed back to stock unrooted, called Sprint (they refreshed my signal and had me do an OTA activation), manually changed my PRL, upgraded to MA6, updated profile (when I could get it work).........and I think that about sums it up. The one thing I've noticed is my phone works flawlessly when the network mode is set to CDMA. At this point I'm clueless. I really don't think it's a phone issue because 3g works on CDMA. It's like when the phone is set to CDMA/LTE and it doesn't have an LTE signal, it doesn't know what to do. That up arrow flashes in such a rhythm that it's like the code is stuck in a loop.

LG OPTIMUS G (SPRINT LS970) CRICKET FLASHED 3G INTERNET ISSUE (Erratic 3G)

I flashed the phone over to cricket but the 3g won't stay on, only way to get it to turn on is to switch from CDMA to LTE/CDMA and vice versa and then turning the mobile data off and on. But if you dont use the Data, it turns itself off again. Anybody know how to fix this?
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I'm having a similar issue with my Lg Optimus G LS 970 (Sprint) Flashed to Cricket. 3G Does not automatically come on and off. What I have to do is turn off and on the wi-fi multiple times in a row. then the 3G pops on. My data is very slow under 50K down and the 3g times out within 3 to 4 minutes. I tried at different locations around my city. I feel like i'm so close like one setting off.
I have tried re flashing the internet settings with multiple programs, tried simple and mobile ip, I almost think its a setting in the phone. What could be causing the phone not to automatically connect to 3g mobile data? Also why when it does connect the speeds are slow and the connection times out so fast?
This phone is awesome but not having reliable data out and about is killing me.
Oh more thing is it possible to configure the LTE radio on the phone now for when cricket brings LTE to the Portland Market?
Any body have any ideas?

Correction Turn on and off "data" multiple times to start the 3G data.

Simply flash with wireless workshop
Sent from my LG-LS970 using xda premium

Could you point me in the direction of how you flashed your optimus g? Ive flashed a lot of phones but never an lg

I have the sprint lg optimus ls970 & it is current still turned on through sprint. We tried to take it to cricket to flash it over but the rep said the es something was locked...we are tired of sprint and would love to flash ot over to cricket. What are we doing wrong??

Hello. I have the exact same problem you have when I flash mylg ls980 to PagePlus. Did you ever fix this problem? I flash 3G to all phones I do for pageplus. But when I flash my lg ls980 I get an error MIP: 67. I used the modified nv items posted by a user in another forum so the HDR USER/PASSWORD stick. And the settings in DFS all flash correctly. I tried installing the LG Provisioning APK but it never opens for me and force closes. So I'm thinking this problem is with the phone itself. In the settings of the phone. Because what will happen the 3G Symbol pops up. Then when I look in the settings- status, I will have 1x then EVDO. Then when the EVDO connects, the 3G data disconnects. So I'm very sure its a setting in the phone that I'm not aware of. Because the flash works fine. All my HDR/HA/AAA passwords are right. The DFS flash goes through smoothly. So, I'm not sure you know.... =( Look forward to your reply.

where is this modified nv item ?

Spelunker10 said:
Hello. I have the exact same problem you have when I flash mylg ls980 to PagePlus. Did you ever fix this problem? I flash 3G to all phones I do for pageplus. But when I flash my lg ls980 I get an error MIP: 67. I used the modified nv items posted by a user in another forum so the HDR USER/PASSWORD stick. And the settings in DFS all flash correctly. I tried installing the LG Provisioning APK but it never opens for me and force closes. So I'm thinking this problem is with the phone itself. In the settings of the phone. Because what will happen the 3G Symbol pops up. Then when I look in the settings- status, I will have 1x then EVDO. Then when the EVDO connects, the 3G data disconnects. So I'm very sure its a setting in the phone that I'm not aware of. Because the flash works fine. All my HDR/HA/AAA passwords are right. The DFS flash goes through smoothly. So, I'm not sure you know.... =( Look forward to your reply.
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Any update for this issue? I am having the same problem. I guess the AAA/HA keys didn't stick, so network disconnected after switching to 3G.

adadxbus said:
Any update for this issue? I am having the same problem. I guess the AAA/HA keys didn't stick, so network disconnected after switching to 3G.
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Hi. I figured out this issue for the LS980 but for the LS970 I was only able to get solid stable 1x. Good luck in your search.

Spelunker10 said:
Hi. I figured out this issue for the LS980 but for the LS970 I was only able to get solid stable 1x. Good luck in your search.
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Yes, I am actually using ls980. IS there any trick for this phone?

adadxbus said:
Yes, I am actually using ls980. IS there any trick for this phone?
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See my post this forum.
They have tons of info there.
http:// forum.gsmhosting.com/vbb/f770/flashed-lg-ls970-ls980-3g-connection-problem-1748423/

4G Disappeared

I flashed the Lollipop version of Liquid Smooth on my AT&T G3 and at first everything was working fine, 4G included. After a couple of days 4G disappeared. When this happened it didn't just go to 3G, it lost all data service completely. I originally figured it was the ROM and flashed back to the previous ROM I had using the TWRP backup I made beforehand. Same story, no data service. Figured maybe it was the modem so I flashed a working G3 modem on here, same story. I flashed to a different Lollipop ROM, Resurrection, to see if that fixed anything, nope. This is the ROM I currently have installed. At this point I went and look at the mobile network options and immediately noticed 1 issue, the preferred service was 3G and not LTE. I had an option to change it to LTE but when I actually select LTE it doesn't actually switch, it just stays on 3G.
The one good thing I managed to do was switch the APN to one that worked with 3G. The APN that was originally set was "pta", I can provide the actual APN information if that'll be useful but I figure most ROMs are going to have similarly named APNs. 3G works on at least 2 of the APNs listed for this ROM, "broadband" and "wap.cingular".
I called AT&T and determined that I my 4G service wasn't cut off; not that I really thought it was anyway as that wouldn't explain why I can't even select 4G as a network type. I'm kind of at a loss as to how I just randomly lost 4G access without actually making any changes to the firmware or OS of the phone. I'm also at a loss of how I can get it back.

And I am just sitting here with 3G with speed of 2 Mbps...

No one has any ideas or advice?

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)...