[Q] Bought Used & Has Problems - What Should I Do? - Verizon Samsung Galaxy S III

Hi everyone. Just to start out, I am completely new to the Android world – I’ve tried to read up on these forums and whatnot but I am definitely a noob. I am coming from Apple, and long story short, I’m tired of iPhones and got myself a Galaxy S3 via Swappa in order to keep my unlimited data plan. It was previously rooted, but I requested that it be restored to stock.
I have been unable to get to a Verizon corporate store to get a sim card and activate the phone, so I’ve been using it on wifi around the house. I am having signal issues with the wif – it works everywhere except in my room. The signal shows as weak and keeps dropping every few minutes. My other devices have a strong signal. I have downloaded various wifi analyzer apps from the Play store, and they all show the wifi signal as really weak.
I searched and found numerous threads that this is an issue with some of the phones. I tried messing with settings (factory reset the phone, the router, did the *#0011# and turned wifi power saving off, changed the "keep wifi on during sleep" from always to never, etc) and nothing fixes it.
I would like to know what you guys recommend. Should I go ahead get a sim, activate the phone, update to Jelly Bean and see if that fixes the issue? I am unable to get the update since I do not have service. I tried to update via Kies, but it says current firmware pda:lg1 phone: lg1 csc: lg1 (vzw) not supported.
Or should I tell Verizon about the problem and see if they will go ahead and replace the phone? I’m not sure how that works since I am not the original owner. I’ve read that they honor the warranty based on the purchase date which is tied to the IMEI number, and not the owner’s name. Not sure how true that is… Also on the box, it says Verizon 4G LTE Certified. Not sure if that means my phone is already a certified replacement or if all the boxes say that. I haven’t been able to find that out.
I’ve read the thread about resetting the phone to return to Verizon. The flash counter screen reads Odin mode, product name: SCH-I535, Custom Binary Download: No, Current Binary: Samsung Official, System Status: Official, Qualcomm Secureboot: Enable. The android version is 4.0.4 and the baseband is I535VRLG1. Does it matter what the kernel, build number and hardware version are? I’m not sure what they should be.
I just want to be prepared when I walk into the Verizon store (which is unfortunately over an hour away), so I’m hoping I can get some opinions and maybe save myself multiple trips. I’m not sure if Verizon will work with me or not, but I figured you guys are the experts and can help me out. Thank you!

It looks like the guy who sold you the phone did in fact fully return you to stock. But it is fully stock based on the oldest stock firmware (I535VRLG1). My advice to you would be to activate the phone, and grab the OTA updates all the way up until the current version (I535VRBLK3).
I used to have all kinds of WiFi connectivity issues with this phone, until I replaced my router. Now it works perfectly. There was no real explanation as to why that was, but this phone does seem to have WiFi connectivity issues, especially with older Routers.
Try updating your software first, and see if the problem resolves with the new firmware. I believe Verizon does base the warranty off of the phone activation date, at least they did years ago in the past, but that may have changed.

Thank you, I appreciate the reply. I read that there was an OTA update issued around October to fix some of the wifi issues, but I wasn't sure if I had it. Once I activate the phone with the sim, do you think there will be any issues receiving the updates? I know nothing about rooting and have been trying to read more about it, but I'm concerned I'll end up causing more problems with the phone before I even get to use it.
The router I have is a free one Verizon gives to use with their dsl service - a Westell Model 327w. It is pretty old, although I think the firmware is up to date. The phone works fine when it is closer to the router and everywhere else in my house, except my room which is upstairs and at the other end of the house. I just figured since my other devices work fine, the S3 should too.
Thanks again.

If you are fully stock, with the stock recovery (which it sounds like you probably are), you should have no problem downloading and installing the OTAs. I believe you will have to take a few them before you get up to the current version.

I can confirm that the stock Verizon GSIII has a few upgrades before you get to 4.1.1 (the latest version)

Thanks guys.
I just remembered that I have a newer router that Verizon sent me, but I never bothered with it because the current one was working. I'll try and set that up and see if the signal improves.
I am hoping to get to the Verizon store soon, but unfortunately things keep happening that prevent me from making the trip. Can't wait to get this phone working though. Just the little bit I've played with it makes it difficult for me to go back to my iPhone.

This is how a noob post should read. Nice job, OP -- very informative and you did some homework.
Other noobs take notice -- this is how you do it. Notice how much help he got?
Sent from my SCH-I535 using Tapatalk 2

If its any consolation, I had wi-fi issues even with a newer Verizon router all the way up to the latest version of the the modem and rpm file (vblk3). With the last and latest (vblk3) update, those problems disappeared. So as stated, I would update the software to the latest and hopefully you should be good. Just to add, my wife had the same problems (same phone) as well so this validates for me that it was a software issue.

Related

[Q] LRX13O T-Mobile Cellular connection issue

I'm with the new Lollipop LRX13O roms.
Somehow, It's getting trouble in connecting T-mobile network. Wi-fi definitely works fine. But, it's struggling to find 2G/3G/LTE and just no bar, or sometime bars with no calls or data.
I already tried resetting APNs, and set the cellular network, but no luck here.
If anyone experiences the same problem, please let me know.
Thanks.
hrm I was afraid that this sort of thing could happen. Ah good old early adoption bugs and whatnot Seems to be a reoccurring theme of late with Android updates and cellular providers. Particularly T-mobile. I know it may seem like a dumb question but have you tried it in different areas ie different towers? how about reboot?
I'm on T-Mobile and I'm doing okay. You could try flashing a different radio and see if it works.
Should add I'll be updating mine as well. Currently on T-Mobile $30 plan. Just have to figure the best method forward yet. Most importantly is getting a good backup image(currently stock with locked bootloader).
crucialcolin said:
hrm I was afraid that this sort of thing could happen. Ah good old early adoption bugs and whatnot Seems to be a reoccurring theme of late with Android updates and cellular providers. Particularly T-mobile. I know it may seem like a dumb question but have you tried it in different areas ie different towers? how about reboot?
Click to expand...
Click to collapse
Hopefully, this is just a problem only for me. I rebooted multiple times, and actually tried another Stock 5.0 rom, but having the same issue.
For last a couple of days, I didn't have a chance to go out from home, so didn't check from other areas, but tried different places near home though. And weirdly, my wife's Galaxy Note 3 has no problem at all in both call and data.
TheLastSidekick said:
I'm on T-Mobile and I'm doing okay. You could try flashing a different radio and see if it works.
Click to expand...
Click to collapse
I re-flashed the LPX13D the Preview Radio, I believe that is the most recent radio. But still no luck. I'm kinda hesitating to flash the KK radio, maybe I should try it anyways.
iexplus said:
Hopefully, this is just a problem only for me. I rebooted multiple times, and actually tried another Stock 5.0 rom, but having the same issue.
For last a couple of days, I didn't have a chance to go out from home, so didn't check from other areas, but tried different places near home though. And weirdly, my wife's Galaxy Note 3 has no problem at all in both call and data.
Click to expand...
Click to collapse
Yeah I know how that goes. Its kind of amazing that these devices work as well as they do. There's so many things that can cause glitches. Best of luck to you!
Anyways about to take the same plunge myself and upgrade. Most likely going the factory fresh route since its a major revision. A chance to unlock my boot loader anyways. I'm sure however something will break, be incompatible, etc. Right now I'm most nervous about the hotspot functionality with T-mobile still working. On the $30 prepaid plan and with KitKat I had to disable IPv6 otherwise I always got the upsell page before I could use it. Even though I don't tether often its nice to have.
flashed a factory stock 5.0 zip yesterday. Came from Slimroms 8. Flash rom,new radio,elemental kernel and super su zip in that order. No problems with anything here. No connectivity issues, no /sdcard issues, no battery drain issues, nothing.

Problems with cellular reception since updating to Marshmellow on my S6 Duos

Hey everyone,
I've never really been into the whole flashing deal and I'm also pretty new to the xda-forums so pls don't hurt! :angel:
Anyway, so live in Germany and imported myself an S6 Dual Sim Version via Amazon, so that I could have Internet both there and at home in Ausria at all times. It had a Russian Baseband and CSC but it worked and filthy casual that I am I really didn't mind until now. It's a really weird issue, so sorry that the post turned out pretty long. I haven't found any similar common 6.0.1 Bugs, however I'm not even completely sure if it really is a problem of the updated OS anymore...
So here's the deal.
In Germany I got the prompt to update to Marshmellow 6.0.1 via OTA. Having heard mostly good things about it I downloaded it without really bothering too much about informing myself about any known issues with 6.0.x . After downloading it in Germany my Signal and Mobile Internet worked fine, however I did experience some battery drain in the following days and decided to initialise my phone via Samsung Smart Switch, as I had done with 5.1.1 when I first got the phone because it's cpu never went into sleep mode. Worked out fine then.
Well ever since I did the same thing with my S6 with 6.0.1 the whole dilemma started. Regularly, my phone will show 4G Signal Reception and even full bars, but I am not able to load a webpage or even be called by phone. Wifi works fine, when I have these outages. When I activate flymode and deactivate it again, my reception works again for a couple of minutes, however, the issue will return after 5-10 minutes. Usually even faster when I'm in a moving car or train.
When I switch SIM Cards I can be called on both, but I can't seem to connect to my mobile internet on the Austrian card (can't check on the mobile connection from the german card as roaming is locked by the provider). I went to my austrian network provider and had my sim card replaced, no change. I flashed DBT G920FXXU3DPCA Android 6.0.1 via Samsung Updates hoping that the right baseband would fix it - Nope.
Any of you guys have any other ideas? My last resort is flashing back to 5.1.1 stock. Trying to replace it through Amazon will probably be hard, because the KNOX Counter is tripped. It already was before I flashed 6.0.1, but that doesn't really matter to Amazon I guess. Also the bug is way to specific to replicate anyway, so I'd probably receive the same device back and I don't really know how I could prove via screenshot, etc...
If there's anything I can upload that would help, pls tell. Hoping somebody here might have an idea!
Having similar problems but also with wifi. Any advise appreciated
Skickat från min SM-G920F via Tapatalk
I have the same problem with cellular reception with my S6 duos G920F. My problem is only with sim slot 2 though. It seems to show full bars but when people call me they are getting me as unreachable.

I believe the last tmobile OTA update broke my 4G/LTE, questions inside.

I believe the last t-mobile OTA update broke my 4G/LTE, was working fine before but now nothing at all. Only Wifi works. -- I took it in store and we did a new sim, some resets, nothing worked there, was going to warranty RMA the device but there's a small crack at the top of the back glass which voided the possibility of doing that.
I'm very experienced with Root, I've done the Note 3, 4, and 5 before so I'm comfortable doing that. I think a root and flashing... pretty much anything else might fix it. Am I being stupid? What do you guys think, any thoughts would be appreciated.
Sorry if this a easy known issue with an easy fix, that'd be great and I don't think so, but I wouldn't exactly say I'm in the loop as far as the S7 goes.
Thanks, hope to hear from anyone soon!
- Simon
Do you get 2G "Edge" service? or nothing at all?
You're not crazy after updating I lost all cell service. since downgrade isn't possible i had to flash 930U firmware, fixed that issue and performs much better...there's a thread on here with more info...hope that helps
Sorry for the slow response guys, thanks.
esjames said:
Do you get 2G "Edge" service? or nothing at all?
Click to expand...
Click to collapse
Nothing at all.
noizyboy said:
You're not crazy after updating I lost all cell service. since downgrade isn't possible i had to flash 930U firmware, fixed that issue and performs much better...there's a thread on here with more info...hope that helps
Click to expand...
Click to collapse
Oh wow ok, this is actually good news for me. Can you go into a little more detail on what you did. Maybe link me to the thread about it and/or the download to the firmware. Thanks!
This happened to my dad's S7 as well. Was working fine after update and then suddenly nothing except wifi.
The Nov TMO update has great battery optimizations.
http://imgur.com/a/iToWI
I am also having the same issue with my wife's S7. In fact, exactly the same as the OP, including the warranty void due to a small crack on the back cover. Performed the OTA and everything seemed ok for few hours afterwards. Woke up the next morning and discovered no network, no signal but yet WiFi functions fine. I went through all the initial checks and resets and nothing worked. Swapped Sim cards, uninstalled some apps and yet nothing until the last app uninstalled. Mobile network became available as soon as Milk Radio finished uninstalling. I know that this is by coincidence but hooray.... And of course a few hours later, Error Registering On Network. Factory resets, hard resets and nothing. I'm out of ideas and luck. And you gotta have a lot of luck with T-Mobile insurance. Any ideas or help with this issue would be greatly appreciated.
What can T-Mobile S7 flash? Anything?
forum.xda-developers .com/tmobile-galaxy-s7/help/sm-g930u-flashes-to-sm-g930t-t3480070
Most of the Info is here also the firmware and tools needed, there is also a guide.... I had to sim unlock my phone before proceeding
Well, I updated to the most recent PK1 and I'm still getting network errors. Status, radio off, network not registered, signal is dead 113dbm. Looks like I'm going to pay the $175 insurance deductible and hope for the best. Best of luck for the OP. Hope you figure it out.
On my S7edge the new update drastically hurt my signal for 4g.. I ended up flashing the U firmware and am using the previous tmobile cp file (PIA) on my phone and got back the signal that I had lost.. This could be a possibility for yall too... Install the 930 U firmware and replace the U cp file with the tmobile PIA cp file for your device and you should gain back your network signal.. I plan on trying this on my sons S7 over the next day or 2 once I get all the files downloaded...

Note Pro 12.2 Update After Canceling Data Plan

I recently picked my note pro 12.2 back up after some time sitting unused. I finally got around to getting the flickering screen fixed and want to get back into using the tablet more often. The issue I'm having now is updating to a more recent firmware. I'm unable to even check if I have the most recent firmware because I don't have a Verizon data plan or SIM anymore (long time coming) and it doesn't seem to want to update without that connection. Does anyone have a way to go about updating the tablet manually?
Also, is there anyway that I can flash the Wifi firmware on to the tablet so it ignores the fact that I have the data connectivity and acts like a wifi model? I've rooted multiple phones in the past, and as long as I have a good set of instructions I can do quite a bit but I'm still looking for an answer to this question.
Thank you.
you can use samsung smartswitch for PC: http://www.samsung.com/us/support/owners/app/smart-switch
to get the latest firmware.
just note if you need root, the new versions of 5.1.1 are not yet rootable.
unfortunately this device has a locked bootloader so flashing a non Verizon firmware to get wifi only is not possible currently.
I have noticed if you have a sim card installed with no service (I have a Tmobile sim with no service currently) it drains the battery pretty bad as it keeps looking for service, connecting and then disconnecting.
I turned off mobile data in the settings which fixed that for me.
Thanks for the info. I'll take a look at updating it to the latest firmware. I don't need root, was going to do it if we could flash the wifi firmware.

[Global ROM] MMS and Verizon - Called Verizon Support, Still Broken

Hello all,
Phone: Mi Mix 2S
MIUI: Global 9.6.4 Stable
Model: M1803D5XA
Carrier(s): T-Mobile(SIM1) & Verizon(SIM2)
Issue: MMS receiving is limited to 30kb when using the stock Xiaomi and Android Messages messaging apps. APN settings do not show on device for Verizon SIM(doesn't matter if in Slot 1 or Slot 2).
So I called Verizon and worked with level 2 tech support to try and troubleshoot this issue. Basically, the MMS and/or Device server on Verizon's end cannot verify the device and therefore limits MMS sending to the device as it cannot authenticate. This verification is done by verifying the IMEI of the SIM and the device identification.
So basically level 2 tech support cannot verify the device manually and cannot submit a request to add the device information either, it has to come from the vendor(Xiaomi) to Verizon.
Anyway we can request this from Xiaomi going forward? Seems weird to have all the bands for Verizon, can get full 4G LTE coverage but I can't receive more than 30kb per image.
I had this issue at first. Flashed latest stable and it was fixed. It's fixed on miui 10 beta and its fixed on treble builds
aeppacher said:
I had this issue at first. Flashed latest stable and it was fixed. It's fixed on miui 10 beta and its fixed on treble builds
Click to expand...
Click to collapse
Well I flashed to 9.6.4 stable, which I thought was the latest stable?
I'm flashing MIUI 10 right now...guess we'll see what happens.
*Edit, still not working on Verizon. And now on MIUI 10, Dual 4G is broken.
*Edit 2, now I have Dual 4G back. Verizon needs to be SIM 2, but be the default for Internet....
I'm on VZW only and I'm on the latest MIUI 10 beta. I'm experiencing this as well. My wife receives good quality images from my phone but when she sends from her Pixel XL to me they are terrible. As are images I receive from anyone else. Kind of a bummer.
Are you guys having issues getting connected on Verizon now? I'm not able to reliably connect at all, most of the time it just sits on 1xRTT on VOICE, and won't connect to data. I can get it to connect to LTE/VOLTE by smashing airplane mode or disabling radio over and over again. Occasionally it will go to LTE, but it doesn't stay working and drops out. I can't drive anywhere and even conduct a phone call as that doesn't stay up either. When it drops, it hard drops and acts like the modem is being reset, instead of roaming to a new cell tower.
Edit, forgot to mention, called VZW, they gave me the finger and tried to sell me an iPhone XS Max 512GB as a "suitable replacement" for my 8GB/256GB phone. They were not helpful, and told me that they have "teams taking steps to make uncertified phones not work on Verizon's network for security and safety reasons". I have tried two different sim cards as well, both with active service and both work in all 3 generations of Pixel XL that I have.
Why the hell would Verizon troubleshoot a phone they haven't certified for their network? Quit complaining.
Sent from my Mix 2S on VZW & Google Fi
JonMS said:
Why the hell would Verizon troubleshoot a phone they haven't certified for their network? Quit complaining.
Sent from my Mix 2S on VZW & Google Fi
Click to expand...
Click to collapse
Cause I pay them every month to provide me with service. They could've atleast escalated to someone with a brain and ability to look at logging on their side and tried to help. Your comment was not needed.
I have been struggling for days with my Verizon connected Mi Mix 2s. At times I could connect with VOLTE but I lost my MMS. This past weekend I tried various ROMs with no difference. I finally cleared everything, loaded TWRP and then flashed the Global developer beta.
I also put my SIM back into a phone that Verizon would recognize and reset the card.
When I was up and running again I did the *#*#86583#*#* to unlock VOLTE and then the 4636 dial to set LTE only. So far so good. I was then able to go back and add a correct apn for verizon. With Verizon Messaging app everything is working and stable, including MMS. Afraid to mees with it again. But it is possible to get the phone to work with Verizon.
mesament said:
I have been struggling for days with my Verizon connected Mi Mix 2s. At times I could connect with VOLTE but I lost my MMS. This past weekend I tried various ROMs with no difference. I finally cleared everything, loaded TWRP and then flashed the Global developer beta.
I also put my SIM back into a phone that Verizon would recognize and reset the card.
When I was up and running again I did the *#*#86583#*#* to unlock VOLTE and then the 4636 dial to set LTE only. So far so good. I was then able to go back and add a correct apn for verizon. With Verizon Messaging app everything is working and stable, including MMS. Afraid to mees with it again. But it is possible to get the phone to work with Verizon.
Click to expand...
Click to collapse
Hi - is your SIM a newer (or brand new) SIM? I am seeing something in the logging on the radio logs that the SIM doesn't contain any carrier information, and was also seeing several errors about missing CMDA specific settings. This weekend I spent most of the day on Saturday and Sunday testing build.prop edits, and messing with the apns-conf.xml file settings. I could not get anything other than 1xRTT most of the time (I modified one of the existing entries in the list of APNs to be an exact match of what my Pixel 3 XL has) and by forcing LTE Only in *#*#INFO#*#* I was able to get LTE for brief periods of time, but not consistently. On 8.11.29 and 8.11.23 builds I can't get data working consistently, and if VOLTE isn't turned on, I can't get it to even act like it's going to connect LTE. I checked the APNs and played with it for hours, but not much success. The device just seems to "connect" but if you try to call on VOLTE or use LTE data to do something, the radio appears to reset. I am wondering if someone at Xiaomi neutered something in the RIL setup for their builds that broke CDMA compatibility. When I have time again, I will do some more comparison to see if I can figure out why it's not working. I'm planning on decompiling some of the files in question and looking at the code and configurations to see if something in there is the cause. The radio logs do not have a smoking gun. I also grabbed a copy of the build.prop file from MIUI9/Oreo and I am going to compare to see if they have some kind of prop flags that are missing in the MIUI 10 builds and or PIE builds.
I am going to find a way to make this phone work on Verizon.
Eventually, I rolled back to MIUI9 on Oreo (I don't know the build off the top of my head and the phone isn't near me) via fastboot. I have been able to get decent connectivity with that software version on Verizon where I live. I had to create my own APN, and have been using that with limited success. I submitted a bug report on the MIUI bug reports page. If you want to upvote that bug, the link is here: https://en.miui.com/thread-4724630-1-1.html
Edit: I just went to lunch and couldn't get the phone to connect to anything but 1xRTT the whole time we were at lunch (I didn't force LTE only, as I haven't had to previously since I rolled back). My next steps when I have time is to compare the build.prop between the builds, but I am not expecting to find anything. I am starting to suspect from the differences in the way the logging looks that they may have messed with the code or config information for the the RIL setup in the Android before they built it.
Please keep posting what you try, I'll be following with interest! I had everything working for a while but since MIUI 10.0.6.0 mms has broken.
DeadJenkins said:
Please keep posting what you try, I'll be following with interest! I had everything working for a while but since MIUI 10.0.6.0 mms has broken.
Click to expand...
Click to collapse
Can you get data and phone services? Mine won't stay connected, but that could be a hardware problem.
PWn3R said:
Can you get data and phone services? Mine won't stay connected, but that could be a hardware problem.
Click to expand...
Click to collapse
Yeah, data and phone have been fine so far, I think a few times it's disconnected but messing with the APN has fixed it. In general, I'd say my data and phone have been pretty stable. MMS on the otherhand, I had working for a bit on 9.6. On 10.0.4.0 it's been really slow to send and receive or not working at all. When it did work, picture quality was awful.
PS, I have my phone set to Vietnam by mistake. I have an older SIM card, at least a few years.
PS still working fine.
Mine has been repaired, they had to resolder a connector for the antenna on the board and the logic board was dropped. I saw this happen, however, signal levels are as good if not better than the pixel devices in the same spots for me, so I don't think anything is permanently damaged. I've been debating trying to order another Mi Mix 2 from somewhere or ordering a Mi Mix 3. I have built roms and have a lot of android troubleshooting experience, and I can't seem to figure this one out. What I am seeing on my device is that once it is connected, it seems to not want to roam properly. Like disconnecting from one cell causes a modem reset and then it takes a long time to reconnect. I am going to keep working on it though.
PWn3R said:
Mine has been repaired, they had to resolder a connector for the antenna on the board and the logic board was dropped. I saw this happen, however, signal levels are as good if not better than the pixel devices in the same spots for me, so I don't think anything is permanently damaged. I've been debating trying to order another Mi Mix 2 from somewhere or ordering a Mi Mix 3. I have built roms and have a lot of android troubleshooting experience, and I can't seem to figure this one out. What I am seeing on my device is that once it is connected, it seems to not want to roam properly. Like disconnecting from one cell causes a modem reset and then it takes a long time to reconnect. I am going to keep working on it though.
Click to expand...
Click to collapse
So you had a hardware issue? After the fix, which things work and which don't work for you? When I disable VoLTE carrier check, I get the VoLTE symbol, but I can't make any calls. I've been messing with the SMSC, where it seems changes aren't persisting. I can't get mms to work anywhere but the stock app, which sucks because the stupid MIUI stock messaging app doesn't have group mms >.>
I had a screen break due to it falling on a very sharp corner of an object from about 6 inches up. I took it to a phone repair place locally. They dropped the logic board, camera, front facing camera/charging interface board as well from like 4 feet up onto concrete. The person who tried to repair the screen (which I provided the replacement for) did not follow the instructions on the video either and removed the plastic lining bezel from the phone body (you are supposed to remove the screen from the bezel with a heat gun). They had to send the phone out for micro-soldering to re-place and reattach the antenna connectors for the cellular and wifi antennas. They had to pay for that. I know what the phone looks like inside from watching the videos of how to replace the screen. When they gave the phone back, there was a substantial gap between the edge of the screen and the bezel in a couple spots (atleast 3 or 4 sheets of paper thickness). I ordered a new frame, bezel and screen all in one and replaced it myself (moved all the components from the original phone body to the new one). Everything appears to work, signal levels are good, but the cellular part will not stay connected, and the modem acts like it's resetting all the time. Sometimes it will stay connected to the repeater in the office I work in for 8 hours straight with no issues, and I can text and call. When I leave that area or go home, it doesn't seem to want to roam to service, and instead of switching cell sites it seems to just reset the modem. There is absolutely a possibility that some small transistor, resistor, cap or something else on this board got damaged when it fell. Given that you guys aren't reporting issues with your devices staying on the network, I'm starting to think I need to go back and make some serious noise at this repair place. I am no stranger to working on sensitive electronics, and I was extremely careful not to damage anything inside when I moved the components (and it was already exhibiting this behavior when I got it back from them before I took repairs into my own hands).
That said, I've spent the last two days trying to figure out if I can do anything that might be helpful with QPST and QXDM as well as playing with various additional build.prop configuration. Nothing there that seemed to help. Rolling back to MIUI9/Oreo seemed to help some but was not a magic bullet. I still had to manually configure APNs and find myself needing to reboot or airplane mode every time the device should roam to a new cell site. I am planning on trying to copy the "carrierconfig.apk" file that is part of the system settings off of a Pixel 3 XL onto the Android Pie MIUI10 beta to see if possibly Xiaomi has something jacked there, but since you guys aren't reporting issues, I am seriously starting to suspect that something is physically damaged after that drop on the logic board, but the intermittent behavior and the fact that the signal looks correct and normal when it's working is going to make it nearly impossible to identify the cause.
As a side note, there's a Mi Mix 3 on it's way from GearBest....
---------- Post added at 04:00 PM ---------- Previous post was at 03:10 PM ----------
DeadJenkins said:
So you had a hardware issue? After the fix, which things work and which don't work for you? When I disable VoLTE carrier check, I get the VoLTE symbol, but I can't make any calls. I've been messing with the SMSC, where it seems changes aren't persisting. I can't get mms to work anywhere but the stock app, which sucks because the stupid MIUI stock messaging app doesn't have group mms >.>
Click to expand...
Click to collapse
So on mine, I can't get it to connect whether VOLTE check is enabled or not. At the office I'm like 10 feet from a repeater, and it seems to connect on LTE/VOLTE (if that's toggled on) very quickly. I have VOLTE enabled on my Verizon account. On the extender, I can make calls on VOLTE, but can't call without VOLTE enabled. I can't get it to connect to VOLTE with the VOLTE carrier check enabled, I have to shut that off and manually toggle. I am noticing massive inconsistencies in the configuration information contained inside the carrierconfig.apk that is loaded in the system build by Xiaomi. I don't see a smoking gun there, but there's a metric crapton of differences.
If I am not next to this Verizon repeater, it usually takes multiple airplane mode cycles or reboots to get onto LTE, it just sits on 1xRTT forever, no texts or data come through when stuck in that mode. Any type of cellular roaming that should happen seems to just cause a radio reset, and it goes to blank bars with X and then it acts like it can't find a network to connect to for a while or goes 1xRTT with full bars and keeps resetting every 20-30 seconds.
PWn3R said:
Cause I pay them every month to provide me with service. They could've atleast escalated to someone with a brain and ability to look at logging on their side and tried to help. Your comment was not needed.
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How is Verizon supposed to support a device they aren't familiar with? This post comes off as whiney. Verizon does NOT have to support every phone capable of their bands, that isn't up to them. Way too many variables using an outside device. With that said, running the latest global beta with the sim card out of my Pixel I have zero issues running Verizon Wireless as primary and Google Fi sim as secondary. Both networks getting VoLTE.
JonMS said:
How is Verizon supposed to support a device they aren't familiar with? This post comes off as whiney. Verizon does NOT have to support every phone capable of their bands, that isn't up to them. Way too many variables using an outside device. With that said, running the latest global beta with the sim card out of my Pixel I have zero issues running Verizon Wireless as primary and Google Fi sim as secondary. Both networks getting VoLTE.
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I expect Verizon to use the standards defined for how these devices communicate. I expect Verizon to assist with troubleshooting by providing information and looking at logs as to what my device is doing on the network. This is not unreasonable. I am not asking them to tell me how to fix the problem on a device they don't support. I am not expecting them to just suddenly support a device, but I do expect them to be willing to look at logs and information on their side and provide feedback. I am glad to hear yours is working and am starting to suspect mine has some kind of hardware damage. The local repair place has refused to do anything to help out because "if it's got a signal, it's a software problem".
PWn3R said:
I expect Verizon to use the standards defined for how these devices communicate. I expect Verizon to assist with troubleshooting by providing information and looking at logs as to what my device is doing on the network. This is not unreasonable. I am not asking them to tell me how to fix the problem on a device they don't support. I am not expecting them to just suddenly support a device, but I do expect them to be willing to look at logs and information on their side and provide feedback. I am glad to hear yours is working and am starting to suspect mine has some kind of hardware damage. The local repair place has refused to do anything to help out because "if it's got a signal, it's a software problem".
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Well, if it worked before the repairs.. it is definitely a hardware issue.
Check your APN settings. I had the exact same issue with my phone, especially after the latest update. I called Verizon for the customer support and they couldn't figure out as well. Then, I pretty much looked at every settings on my phone and tried almost everything, only to have the issue fixed by modifying the APN settings. For some reason, after the update, the SIM card removed the custom APN settings that I added when I first purchased the phone. Instead, it had the CBS, FOTA, IMS, LTE - Verizon Internet APNs available with the APN set as the CBS (Sorry I'm not an expert, so I really don't know what exactly they are. I suspect that those were pre-saved on my SIM cards as I have used the same one for 3-4 different phones?). Anyway, I googled Mi Mix 2s Verizon APN and set it according to the very first result I found. Since then, the MMS has started working well again. Hope it helps.

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