I bought this phone off Ebay about 3 weeks ago. It was labeled as a d820 The listing said for parts does not read sim card but everything else worked. Being Semi decent in the tinkering world I thought I would spend the 40 $ on the phone to see if I could make it work. When I got the phone it was on the setup screen because it was just factory reset. When I put my sim in (T-mobile) it showed that it had a signal. As soon as finished setup it lost the signal and could not connect again. So obviously it is some kind of software issue. So the first thing I did was try to update it from lollipop to marshmallow. Once again it showed it was connected to my network until completing setup. This time when I was in the bootloader I noticed that it said it was a d821. I figured well I paid 40 dollars I was probably going to get ripped off somewhere. So then I started reading about how to use the d821 in America thinnking that was the issue. I tried the qpst thing where you add the additional bands- nothing. Then I messed around a bunch in the cdma tool after reading a thread about adding cdma to the device. I also tried flashing various modems and roms with no luck. Last night I thought maybe theres something I missed hardware wise in the phone so I opened it up. I checked all of the connections and everything was fine. I started reading the numbers and got really confused. On the back of the phone it says d821 under the lg logo. but on the inside of the back cover and the plastic shroud on the motherboard it says d820. This might be irrelevant but it would be super great if someone had an idea of how I can get this to work on T-mobile in the USA because with a decent rom this phone is wayyy smoother and faster than my 5.5" alcatel idol 3 network unlocked from cricket (So lte sucks). All i want is a phone that has a stable lte connection XD
ANY ideas how to fix my D821?
The model # in the bootloader is the correct model #. Is it possible the imei has been blacklisted?
On the motherboard, near battery connector there is info about 32/16gb and d820/d821.
Related
I bought my One S from Telus through a friend who's a Telus customer this past June and used an unlock code bought online to use it with my carrier (MTS). After setting it up with the MTS APN settings it worked perfectly for several months. Then around 2 or so months ago, I got an OTA update to 4.0.3 and as soon as I got the update, the phone started regularly dropping the connection to the network. Signal strength wasn't an issue, it would just cut out completely, giving the message about emergency service only. Some days it wouldn't be too bad and would just cut out momentarily and sometimes it would drop for a good time or drop so repeatedly as to make the phone unable to even dial out. It would sometimes even vary in severity throughout the day. I haven't rooted or unlocked the phone in any way except for a carrier unlock code.
As I was very busy with school, I gritted my teeth and beared it but it seemed to get progressively worse to the point where I finally sat down to seriously look into, and got on the phone with MTS tech support, HTC tech support, as well as trying to talk to MTS sales reps at their store locations. MTS is clueless on what to do (or just refuses to help) because they don't sell the One S. I talked to HTC three times and their only solution was to see what happens with sim cards from different phones and they also noted that the stock software, as well as updates, are tied to the carrier and could be causing problems.
MTS also talked me into buying a new sim card and seeing if that fixes the issue, where it actually made things worse somehow and now the phone often cannot get a connection at all or drops it and doesnt pick it back up (on the settings screen, "mobile data" gets stuck at "turning on" but even voice doesn't work). I've tried getting other people's sims to try in my phone but they all seem to have ones of different sizes. All I've been able to try is a Rogers sim (which I only could test for a short time, but seemed to stay connected and stable for that time) and a Telus sim (which wouldn't work at all, strangely enough. Though one person I talked to at HTC said that by unlocking my phone its possible I received the OTA update from a different carrier such as Rogers).
I'm not sure what to do here as I've tried messing with many settings and searching for solutions without finding one that works. One of the HTC reps I talked to said that I could either send it in (and lose the phone for 2-3 weeks without a guarantee this wouldn't happen again) or while they can't recommend it, I could try rooting the phone and downgrading the software to what it was before. A guy I talked to at a local cell repair shop listened to my problem for about a minute and a half and then said rooting would fix it.
If anyone has any suggestions, I would greatly appreciate hearing them. I'd like to get some more input before I void the warranty by trying to root it and replace the software with some in case that doesn't fix it and I have to send it into HTC for a big fee.
I wasn't going to post this, but what is happening to me seems to be more than just bad luck.
I am still having issues. I have three 16GB nexus 5 on December 16th and a 32 GB nexus 5 on December 27th 2013. They were all brand new, the boxes haven't been opened.
Last weekend (mar 1st 2014) my wife's phone's (nexus 5) radio just randomly died. it had "No Service".
We swapped simcards, still didn't work. SIM card was fine.
The simcard from the dead phone, worked on another phone. But a working SIM was not working on that phone.
I factory resetted the phone. Rooted the phone, to reload the Modem image, nothing happened. Loaded Cyanogen v 11, nothing.
But I then went and sold my phone of on Kijiji for $200 and bought a new one instead.
This Week again (7 days later after the death of the first phone), my phone died (2nd phone). Same thing. No cell network (it was working today morning, did at around 11am), No Service.
You cant connect to the Koodo Network even if you find it on the network list manually.
Koodo said it is an hardware issue with the Nexus 5.
I tried a SaskTel sim, same thing. Doesn't work on the phone with dead radio.
I called LG, they keep sending me to the cell carrier to get warrantied. And Cell carrier, sends me to LG, and Repeat..
FML
Now I am just waiting for my other 2 phones to die. If all four phones die, then there is something really wrong.
Does anyone have any suggestion to bring the radio back up?
(It is funny when you call Tech Support for the phone, they say "please remove your battery and put it back in again".. Lol. Nexus 5 battery is not removable.. duh!)
resal3000 said:
I wasn't going to post this, but what is happening to me seems to be more than just bad luck.
I am still having issues. I have three 16GB nexus 5 on December 16th and a 32 GB nexus 5 on December 27th 2013. They were all brand new, the boxes haven't been opened.
Last weekend (mar 1st 2014) my wife's phone's (nexus 5) radio just randomly died. it had "No Service".
We swapped simcards, still didn't work. SIM card was fine.
The simcard from the dead phone, worked on another phone. But a working SIM was not working on that phone.
I factory resetted the phone. Rooted the phone, to reload the Modem image, nothing happened. Loaded Cyanogen v 11, nothing.
But I then went and sold my phone of on Kijiji for $200 and bought a new one instead.
This Week again (7 days later after the death of the first phone), my phone died (2nd phone). Same thing. No cell network (it was working today morning, did at around 11am), No Service.
You cant connect to the Koodo Network even if you find it on the network list manually.
Koodo said it is an hardware issue with the Nexus 5.
I tried a SaskTel sim, same thing. Doesn't work on the phone with dead radio.
I called LG, they keep sending me to the cell carrier to get warrantied. And Cell carrier, sends me to LG, and Repeat..
FML
Now I am just waiting for my other 2 phones to die. If all four phones die, then there is something really wrong.
Does anyone have any suggestion to bring the radio back up?
(It is funny when you call Tech Support for the phone, they say "please remove your battery and put it back in again".. Lol. Nexus 5 battery is not removable.. duh!)
Click to expand...
Click to collapse
This doesn't sound like a dead modem, but more like a problem with your network. You say you can see Koodo Network in the network list, if that's really the case, your modem is not dead. Is Koodo perhaps blocking your ESN from connecting to their network? (This is independent of sim card). There are not a lot of reports of Nexus 5's modems going dead, and the fact that you had two do this really suggests a network problem. Can you switch to a different provider? Lastly, when you go to system settings, about phone, do you have a baseband version (modem softwre) listed? I have had phones randomly lose their modem software (although very rarely). Can you also check and see if the basebands are the same for the working and non working phones?
Hello! Tonight, it appears that there's something up with my phone. It informs me that I can only make emergency calls and I can't make calls nor send texts either even though its showing me five signal bars. I have to reboot into safe mode then back out again in order to get it fully functioning without hiccups.
I've searched around for a couple of hours and saw that people are reporting some hardware fault. Although they also said that their phone was unable to search for available network operators in their area. Unlike theirs, mine is able to search for available network operators.
Is it possible that the charger I'm using is causing problems? I'm using my dad's Zenfone 2 charger brick with my original samsung cable. I've ordered an Aukey quick charger though.
Is it also possible that the phone's gotten quite hot that it's already messing and needs to cool down? I've flashed a bunch of times since I was trying on some of my mods.
My phone's a K variant and it's been rooted for quite some time so that's not the case. I've also tried inserting my sim card in a different phone and it seems that my sim card's not the problem as well. I hope my phone's just having a bad evening lol.
Any ideas on this?
The Android Manual said:
Hello! Tonight, it appears that there's something up with my phone. It informs me that I can only make emergency calls and I can't make calls nor send texts either even though its showing me five signal bars. I have to reboot into safe mode then back out again in order to get it fully functioning without hiccups.
I've searched around for a couple of hours and saw that people are reporting some hardware fault. Although they also said that their phone was unable to search for available network operators in their area. Unlike theirs, mine is able to search for available network operators.
Is it possible that the charger I'm using is causing problems? I'm using my dad's Zenfone 2 charger brick with my original samsung cable. I've ordered an Aukey quick charger though.
Is it also possible that the phone's gotten quite hot that it's already messing and needs to cool down? I've flashed a bunch of times since I was trying on some of my mods.
My phone's a K variant and it's been rooted for quite some time so that's not the case. I've also tried inserting my sim card in a different phone and it seems that my sim card's not the problem as well. I hope my phone's just having a bad evening lol.
Any ideas on this?
Click to expand...
Click to collapse
The only thing I can think of outside reinstalling roms and what not is to flash a newer modem only, on the handset. I honestly can't comment on if the charger could be the issue
It sounds like a software issue, not hardware, as you can get it working. I'd flash your latest stock, then factory reset and see what happens.
Sent from my SM-G920W8 using Tapatalk
So I have a Z Fold 2 I bought on ebay. I believe its a Verizon device however the model number is SM-F916U1, and I know Verizon unlocks their devices after 60 days. I've had the phone for about 45 days now. Well whenever I try to use my cricket sim card in it it will register on the network just fine and everything works for about 10 to 15 minutes and then it kicks me off the network and locks it up. Do I need to get my phone unlocked or is there something I'm overlooking? Can someone point me in the right direction I've been Googling the hell out of this and can't find an answer.
I would guess it's a stolen z fold did u check the imei? When I bought my z fold 2, i got an empty box from ups. Had to file a police report and everything. I didn't buy from ebay but best buys. I never had a ups package stolen until this phone so if I were to guess the one u bought off ebay might not be good.
Yes that was the first thing I did its not stolen and jts fully paid off.
I'm completely wrong then. Sorry I'm not sure possibly 60 day thing like u said. Can u try a different sims?
Yeah I've tried different sims and they all work except after 15 to 20 minutes it suddenly kicks me off the networks and says network locked. When I first got the phone I put a Verizon postpaid sim into it hoping it would somehow help but idk. The problem here is I don't know when this phone was originally purchased or if it was ever activated on Verizon before I got it in my hands. Is there any way to maybe find that info out?
Most likely you'd need to contact Verizon to get them to unlock it on their end, however since you weren't the original owner, they might refuse to do it.
I did contact them and they said on their end the phone shows as unlocked.
I purchased a used US version Rog Phone 5 recently through an online seller. When receiving the phone, I gave it a good once over and powered it on and tested wifi and such and everything seemed to be in good working order. I then rooted the phone and set most of stuff up. After inserting my sim card, I noticed the cell reception was not that great. I suffered through for a couple of days but was missing calls and texts like crazy. I was constantly dropping reception entirely in areas where I have very good signal with other phones. The phone is essentially useless now. I tried several factory resets, flashed back to the non-rooted boot image, and then flashed to an older firmware with no improvements to signal. I can't imagine the reception issue is in any way related to the rooting process, but I'm throwing this out there just in case anyone has seen anything similar in the past.
A few things to note:
I am on AT&T
The APN is definitively configured correctly
I could have returned the phone to the online seller for a refund prior to unlocking the bootloader, but did not insert a sim before rooting, so I have no idea whether the issue was present from purchase or not. Lesson learned, I suppose... do a more thoroughly inspection before doing anything that will void a warranty or refund agreement.
I have tried the same sim in two other phones with no issues.
Everything else about the phone seems to work perfectly, only poor reception.
I had the phone up to approximately 30 miles from my house with no change, so it isn't limited to a specific tower.
Does anyone have any ideas? If I don't come up with anything I will be posting it on ebay as "not working - for parts only" so I will try about anything at this point.
Sim recognition issue
Owned the phone for about a month now. Phone was working perfectly fine for the majority of this time. I use 2 different sims and they were both working smoothly until recently. A few days ago, I woke up and the phone wouldn't recognize the Sim...
forum.xda-developers.com
sim card problem
just all of sudden it became invalid sim try multiple time reset or clear data cache sim toolkit original sim to other phone is working other sim to original phone is working other sim to other phone is working anyone face the same problem...
forum.xda-developers.com
Sounds like they pawned the issue off on you, but it should still be under warranty to have it repaired. When you contact Asus, don't mention unlocking the bootloader. Stick to the hardware concerns.
I have looked over both of those threads, but it seems to be a different issue. My sim is recognized fine, its just the signal strength that appears to be extremely low. Even when the phone has no service at all, it still recognizes the AT&T sim is present.
cpenticuff said:
I have looked over both of those threads, but it seems to be a different issue. My sim is recognized fine, its just the signal strength that appears to be extremely low. Even when the phone has no service at all, it still recognizes the AT&T sim is present.
Click to expand...
Click to collapse
Yes, it is not the same issue, but it appears to be a similar issue. The important detail being that both required a motherboard replacement.