Develop Bugs

Strange Antenna Issue

Today my phone started having some issues.
In places I was supposed to get full coverage and all bars I am know getting only 2 bars...
And in places I was getting 2 bars I get no signal at all !!!
I think it is an Antenna thing. Maybe it is broken, IDK...
What could I do? I have no warranty as I bought this phone 2 months ago in EUA and I live in Brazil...
Thankss

Anyone?? Help??
I've opened my phone and Everything seemed to be clear and OK.
One thing. When I get signal and start using the 3G a lot. The Signal DOES NOT go off.
This is very strange...

liquelt said:
Anyone?? Help??
I've opened my phone and Everything seemed to be clear and OK.
One thing. When I get signal and start using the 3G a lot. The Signal DOES NOT go off.
This is very strange...
Click to expand...
Click to collapse
Have you tried flashing the latest radio for the nexus? New ones were released recently for the .9 and .10 radios for verizon nexuses. I do not have knowledge of the gsm radios though.

Tempest228 said:
Have you tried flashing the latest radio for the nexus? New ones were released recently for the .9 and .10 radios for verizon nexuses. I do not have knowledge of the gsm radios though.
Click to expand...
Click to collapse
I am not on verizon.
I am using i9250UGLH1 radio.
Where can I get this .10 radio?
Thanks.

I'm also having the same issue. I have a maguro yakju variant galaxy nexus. I'm getting only 1-2 bars and have no warranty as I got it from ebay, gps is also showing problems, but the phone came in new sealed condition. Please let me know if there's a fix to this

It seems to be an Power Amplifier issue. I am gonna put in a Repair Store and they are going to try to fix my phone.
I am going to keep updating this too with the progress.
Thaaankss

What were the dbm stats? Your signal bar never tells the truth unless there is no service at all.

the signal bars are responing to dbm status.
I am checking both on the same time and I didnt get any anomalies betweent them...
I just put the phone to work in a place near home and they said it was an Power Amplifier issue and they're going to try fixing it.
Thanks.

I have exactly the same problem but my phone has only dealer warranty. Is there any chance to fix this through software?

If you have this exact same issue you cant fix it through software, because its an hardware problem...
It should be an hardware thing, if it isn't I don't know what else I could do.

Just updating...
My phone is now working. They changed the PA ( power amplifier) and now I have normal signal!
BUT, I am having two issues.
When I select "only use 2g networks" the phone than changes to edge and connects. When I deselect the 2g option the phone reconnects but it keeps on 2g. It does not switch to 3g...
I have to reboot the phone/radio.
AND,I am not getting 4G HSPA+ anywhere! Only HSDPA...
ANYONE????

Today I also have noticed problems with connection. I've very fresh GNx, had it with me at the office since Monday but today whole day was on GPRS. I thought it is an issue from the GSM network but after coming home where 3G should fly (and it does on Motorola Defy) my GNx was still on GPRS.
But when I make a call the data connection returns to 3G and some time after switches back to 2G.
If I leave phone somewhere where is better coverage it keeps 3G.
Meanwhile my Defy has 3G everywhere.
Shall I sent the GNx back to Amazon?

QDT said:
Today I also have noticed problems with connection. I've very fresh GNx, had it with me at the office since Monday but today whole day was on GPRS. I thought it is an issue from the GSM network but after coming home where 3G should fly (and it does on Motorola Defy) my GNx was still on GPRS.
But when I make a call the data connection returns to 3G and some time after switches back to 2G.
If I leave phone somewhere where is better coverage it keeps 3G.
Meanwhile my Defy has 3G everywhere.
Shall I sent the GNx back to Amazon?
Click to expand...
Click to collapse
Man,
If you are in warranty you should return your phone for them to fix/change...
Try changing radios before doing that. It can be software related!

liquelt said:
Man,
If you are in warranty you should return your phone for them to fix/change...
Try changing radios before doing that. It can be software related!
Click to expand...
Click to collapse
I'm on the same radio since beginning. And the same ROM was while phone kept 3G and now, when it is loosing it.
However, I wonder how much the network could influence the situation.
I've left overnight Nexus and Defy on the strongest coverage point and in the morning GNx was still at GPRS while Motorola switched from 3G down to GPRS.
I'm getting paranoid (and not talking about ROM). Restored phone clean via fastboot to factory state. Will be watching it over weekend and then decide what to do.
8 hrs later.
Phone kept weird for few hours at work and now flies with full range 3G. Also at home where yesterday it was switching to 2G.
I bet this was Vodafone way to thank me for cancelling my contract.
Gonna keep it at pure stock for an hour or two and then will change to some custom ROM... Maybe.

Updating again.
I've been testing my phone with the new "Power Amplifier" and now I can use my phone regularly.
The problem is... The phone does not support anymore the frequency of 850Mhz neither 3G or 2G.
I THINK they have put a PA that does not amplify this frequency.
My carrier uses: 2G:900/1800 3G:850/2100 3.5G(HSPA+):850Mhz mostly
So I understood why in some places I dont have any 3G coverage and in almost all places I can't get HSPA+ speeds.
Am I correct? Does the PA has to do w/ all this frequency thing?

[Q] LTE Drops to 4G - Normal?

I've had my Galaxy S3 on AT&T for about a week. I came from a Lumia 920. Sitting in an LTE area, I'll notice it's working fine. I'll move around a bit in the building, and it'll drop to 4G, but never ever return to LTE unless I switch airplane mode on and off. I was told this is normal when I receive a phone call as well. Is this true? This NEVER happened on my Lumia.

Ethere said:
I've had my Galaxy S3 on AT&T for about a week. I came from a Lumia 920. Sitting in an LTE area, I'll notice it's working fine. I'll move around a bit in the building, and it'll drop to 4G, but never ever return to LTE unless I switch airplane mode on and off. I was told this is normal when I receive a phone call as well. Is this true? This NEVER happened on my Lumia.
Click to expand...
Click to collapse
I am assuming that you are unrooted and on stock. As far as it dropping 4G it could be the building has poor LTE spots. This phone I have noted that the stock rom tends to drop LTE and not switch back. Not sure why. However during phone calls, the radio will always switch from LTE to standard 4G and revert back when the phone call is finished. This is because voice calls are not currently supported on LTE.

aybarrap1 said:
I am assuming that you are unrooted and on stock. As far as it dropping 4G it could be the building has poor LTE spots. This phone I have noted that the stock rom tends to drop LTE and not switch back. Not sure why. However during phone calls, the radio will always switch from LTE to standard 4G and revert back when the phone call is finished. This is because voice calls are not currently supported on LTE.
Click to expand...
Click to collapse
Not doubting you, but I called AT&T about this, and they told me it was normal for data to drop to 4G and stay there until I either power cycled the phone, or toggled airplane mode on and off. Then I would get LTE back. I tried this, and that's what happens to me. Yes, I was on stock unrooted, but now I am rooted. Any suggestions on a good rom that may be able to fix this issue?

Ethere said:
Not doubting you, but I called AT&T about this, and they told me it was normal for data to drop to 4G and stay there until I either power cycled the phone, or toggled airplane mode on and off. Then I would get LTE back. I tried this, and that's what happens to me. Yes, I was on stock unrooted, but now I am rooted. Any suggestions on a good rom that may be able to fix this issue?
Click to expand...
Click to collapse
It isn't an issue. It's normal
Sent from my SAMSUNG-SGH-I747 using xda app-developers app

4g and no network

4g just started popping up on my phone, but every time it does, I have no network access. Is this a phone issue or Sprint just testing out new towers?
Lte turned off for now. Problem solved.

babyschmoof said:
4g just started popping up on my phone, but every time it does, I have no network access. Is this a phone issue or Sprint just testing out new towers?
Lte turned off for now. Problem solved.
Click to expand...
Click to collapse
It happens to me once in awhile. I will connect to the LTE network but no data. After a min or two it switches back to 3G. The LTE networks are up around me, but I don't think the upgrade is 100% complete. I'm thinking its a Sprint issue.
Sent from my Freeza MD4 Stock Rooted Galaxy S3

TheSocalGuy79 said:
It happens to me once in awhile. I will connect to the LTE network but no data. After a min or two it switches back to 3G. The LTE networks are up around me, but I don't think the upgrade is 100% complete. I'm thinking its a Sprint issue.
Sent from my Freeza MD4 Stock Rooted Galaxy S3
Click to expand...
Click to collapse
It happens to me right outside my house... I get 1 bar of LTE service, but no data. I know they have been updated the network around me and chalk it up to that. I just toggle off LTE or hop on my Wifi.

babyschmoof said:
4g just started popping up on my phone, but every time it does, I have no network access. Is this a phone issue or Sprint just testing out new towers?
Lte turned off for now. Problem solved.
Click to expand...
Click to collapse
From the sounds of it, Sprint is adding 4g to your area. They generally start out in the rural areas and make their way inward. You could be on the boundary and we'll continue to get intermittent signals until the get enough work done to get s stronger signal. Hang in there, it gets better.
Sent from my SPH-L710 using Tapatalk 2

[Q] HTC One M8 dropping data connectivity but showing 4G LTE...

Hey everyone!
I have a stock M8 with T-Mobile and I live in LA. I'm new to T-Mobile so I wanted to ask if this is normal.
My phone will lose data connectivity but the 4G LTE sign will stay on. Spotify will stop playing, Speedtest won't work, but the phone keeps telling me I have 4G LTE.
This happens a lot especially when driving, but today it happened while I was in the drive-through of a fast food place. I had barely moved and yet data was working fine at first, then suddenly "poof" nothing works anymore cause no internet, but the phone insists I have 4G LTE.
Usually turning data off and then on fixes it but not always.
Could it be an issue of switching towers? But then wouldn't my signal drop completely? Why does only data stop?
Anyone else having this issue or do I have a lemon phone I should return?

if you are jumping from tower to tower it may not relay properly. Call tmo and tell them to do a signal refresh. call from a different phone.

Do you have power saving mode on? The reason I ask this is bc it will turn your data connection off when your screen locks.
Sent from my HTC One_M8 using XDA Premium 4 mobile app

I feel your edge
Same here ,
Ever since I bought the m8 it happens to me time to time.
Ive tried dis n reconnect the mobile data or go on airplain mode, but sometimes reboot is quicker.
Hope HTC publish a bug fixed firmware soon

Its a provisioning issue on the towers people you need to call tmo...

This was happening all the time to me on my Note 3 which Is why I upgraded to the M8. Just got it last night and it's happened once. Also, the signal isn't as strong. My Note would hold a lte connection with barely 1 bar. The m8 not so much. Likes to switch between 2g, 4g and lte.
Sent from my HTC One_M8 using XDA Premium 4 mobile app

drksilenc said:
if you are jumping from tower to tower it may not relay properly. Call tmo and tell them to do a signal refresh. call from a different phone.
Click to expand...
Click to collapse
I took your advice and did it. Let's see what happens.
Thanks for the help!

cainman said:
I took your advice and did it. Let's see what happens.
Thanks for the help!
Click to expand...
Click to collapse
Did it work? I also just got T-Mobile and live in LA and it happens to me as well. I have a Nexus 5 though.

ainjobizz said:
Did it work? I also just got T-Mobile and live in LA and it happens to me as well. I have a Nexus 5 though.
Click to expand...
Click to collapse
It was fine for a couple of days. Today however I had to wait in the car for 1.5 hours for something and was playing Spotify.
Didn't move for that entire period. For an hour it worked fine, then suddenly it did this again where it wasn't receiving data and yet the 4G LTE sign was on screen.
So I guess it didn't really help. I turned data off and on and it restored it, but still... that's not cool.

cainman said:
It was fine for a couple of days. Today however I had to wait in the car for 1.5 hours for something and was playing Spotify.
Didn't move for that entire period. For an hour it worked fine, then suddenly it did this again where it wasn't receiving data and yet the 4G LTE sign was on screen.
So I guess it didn't really help. I turned data off and on and it restored it, but still... that's not cool.
Click to expand...
Click to collapse
Yeah same here. It happens in my house when I'm using my phone in bed and just loses data but it still says LTE and have to either turn off and on data or reset my phone.
Also on my way to work today I was using Spotify the entire drive, which is about 45 minutes, and never lost data but on the way back it lost it about twice. It sucks and hopefully there's a fix of some sort.
Sent from my Nexus 5 using Tapatalk

I think is not phone problem
tmobile signal issue
my z1 and htc m8 sometime both have this kind of issue
they both show I still have lte icon but just can't connect to network
and sometime you must wait like 1-2 mins to reconnect to network

I have had my M8 for a week and have not experienced any issue with data loss. I am in Miami, Fl. If anything I get way better LTE speeds than I have had with any of my last phones( S4, G2, Iphone 5S)

Same issue with my M8.
Full bars LTE signal and sometimes data just stops working. Need to reboot the phone to get it working again. Was thinking about exchanging the phone but it seems like a software glitch...

Dan37tz said:
Same issue with my M8.
Full bars LTE signal and sometimes data just stops working. Need to reboot the phone to get it working again. Was thinking about exchanging the phone but it seems like a software glitch...
Click to expand...
Click to collapse
I don't have this issue but I do have terrible speeds in south Atlanta.
3-5 bars in my home, and download speeds are from 3-6 Mbps down and uplad from 2-3Mbps up even with LTE. I get much better performance on HSPA+
LTE pings are half that of HSPA though

Just to add on here, in my experience this has more to do with the area and likely the towers supporting that area then software or hardware. Another possibility is T Mobile's network in LA is not 100% compatible with HTC is new radio firmware yet. If that's the case some tweaking by t-mobile on the backend would fix this issue straight away.
The reason I say this is because in Las Vegas, Nevada I never have any problem with LTE losing connection, however, this last week I was in Long Beach, CA (LA County) and constantly had loss of data connection while the phone would still displaying a full 5 bar 4G LTE connection.
Reboot or switching to airplane mode would fix it, however, it got to be so bad and happened so regularly, I eventually stopped using LTE entirely while there. The HSPA+ "4G" connection there was still producing around 10 megabits per second download which was more than enough. So, while there I switched off LTE and had no more issues with data connection dropping.
Long story short clearly seems to be an issue with T Mobile Lte Towers in the greater Los Angeles area. Possibly its an issue in other areas as well.

Behold_this said:
Just to add on here, in my experience this has more to do with the area and likely the towers supporting that area then software or hardware. Another possibility is T Mobile's network in LA is not 100% compatible with HTC is new radio firmware yet. If that's the case some tweaking by t-mobile on the backend would fix this issue straight away.
The reason I say this is because in Las Vegas, Nevada I never have any problem with LTE losing connection, however, this last week I was in Long Beach, CA (LA County) and constantly had loss of data connection while the phone would still displaying a full 5 bar 4G LTE connection.
Reboot or switching to airplane mode would fix it, however, it got to be so bad and happened so regularly, I eventually stopped using LTE entirely while there. The HSPA+ "4G" connection there was still producing around 10 megabits per second download which was more than enough. So, while there I switched off LTE and had no more issues with data connection dropping.
Long story short clearly seems to be an issue with T Mobile Lte Towers in the greater Los Angeles area. Possibly its an issue in other areas as well.
Click to expand...
Click to collapse
Happening here in South Houston too, but i am using a VZW M8 with Tmo.

I also have this issue, but I'm on AT&T and missing some bands that I need, so I was figuring it was that.

I had a galaxy s5 and had same issue.
So i know it's not the phone
Sent from my HTC One_M8 using XDA

Has anyone found a solution to this problem yet? My HTC One M8 has been losing data connectivity ever since I purchased it last month. It will say I have 4G LTE but I will loose data connection regardless. It's a nuisance. I never had that problem with the M7. My camera on the M7 got a purple haze so T-Mobile replaced it with a refurbished M7. It was the worst thing I could've done. The refurbished M7 would freeze and reboot a lot, until it finally got stuck in a boot loop and I lost all my photos, videos, and files. Would not go into recovery. Then T-Mobile sent me a plastic Samsung S4 as a replacement for that because they were out of the M7. The new M8 has been working pretty well except for the annoying data connection loss everyday. I have to activate then deactivate airplane mode to obtain data connection again. Only other time I ever had this happen was with a certain nighyly rom I put on my HTC HD2, but that was rooted, this is a stock phone, I never expected to have a data connection problem with a stock rom.

I had this problem for ages with straight talk with my old phone just before I bought my M8. Exactly the same issue in that my data would seemingly just cut out randomly after a bit then come back later(switching off/on and/or in and out of airplane would restore it).
In my case, it turned out to be my data settings. I played around with different settings one night and found that different settings finally got rid of the problem for me. Your mileage may vary, but it's an easy enough thing to try.

[Q] T-Mobile SM-P607T - cannot connect to 2G/Edge network?

Hello gang,
I picked up a new T-Mobile Note 10.1 2014 edition 2 days ago. So far, everything seems to be great. There is one issue however that seems perplexing. My tablet connects to 4G and LTE networks just fine but for some reason, it will not connect to 2G/Edge networks near my home. I live in a rural part of PA where T-Mobile doesn't have 4G/LTE coverage. My Samsung Galaxy S3 connects to the Edge network near my house without issue. However, my tablet does not connect and simply shows a small X where the signal meter is.
I spoke to T-Mobile tech support this morning and they seem to think that the band covering 2G may be dead. Could this be possible when 4G and LTE work just fine?
Also, the options under Network mode are now limited to 2: LTE/WCDMA (auto connect) and WCDMA only. My SGS3 has a GSM only option which the tablet seems to be missing.
I am running Android 4.4.2. Any thoughts / suggestions?
Thanks!

amstel78 said:
Hello gang,
I picked up a new T-Mobile Note 10.1 2014 edition 2 days ago. So far, everything seems to be great. There is one issue however that seems perplexing. My tablet connects to 4G and LTE networks just fine but for some reason, it will not connect to 2G/Edge networks near my home. I live in a rural part of PA where T-Mobile doesn't have 4G/LTE coverage. My Samsung Galaxy S3 connects to the Edge network near my house without issue. However, my tablet does not connect and simply shows a small X where the signal meter is.
I spoke to T-Mobile tech support this morning and they seem to think that the band covering 2G may be dead. Could this be possible when 4G and LTE work just fine?
Also, the options under Network mode are now limited to 2: LTE/WCDMA (auto connect) and WCDMA only. My SGS3 has a GSM only option which the tablet seems to be missing.
I am running Android 4.4.2. Any thoughts / suggestions?
Thanks!
Click to expand...
Click to collapse
I can't state this as a fact for the tmo P607T but remember that the tmo 3g version of the
Samsung galaxy tab plus 7.0 had a similar situation. Users were looking to add phone functions
to this device.
Turned out on the xda threads that the tmo tab plus 7.0 had no hardware
to support phone functions as the international version did.

amstel78 said:
Hello gang,
I picked up a new T-Mobile Note 10.1 2014 edition 2 days ago. So far, everything seems to be great. There is one issue however that seems perplexing. My tablet connects to 4G and LTE networks just fine but for some reason, it will not connect to 2G/Edge networks near my home. I live in a rural part of PA where T-Mobile doesn't have 4G/LTE coverage. My Samsung Galaxy S3 connects to the Edge network near my house without issue. However, my tablet does not connect and simply shows a small X where the signal meter is.
I spoke to T-Mobile tech support this morning and they seem to think that the band covering 2G may be dead. Could this be possible when 4G and LTE work just fine?
Also, the options under Network mode are now limited to 2: LTE/WCDMA (auto connect) and WCDMA only. My SGS3 has a GSM only option which the tablet seems to be missing.
I am running Android 4.4.2. Any thoughts / suggestions?
Thanks!
Click to expand...
Click to collapse
The GSM mode only makes it so you can force the Device into 2g or Edge mode. If you do not want to use LTE just pick WCDMA which is 3g/HSPA+ and GSM(2g/edge). If you are looking to turn off the T-Mobile data part Pull the Sim card out or just put the Tablet into Airplane mode which you can till turn on Wifi. I bought my Note just for Wifi, and using EIP. So i am not using it with T-Mobile Data. getting a data plan on the tablet is a big waste when you can just hotpsot your phone.

Prod1702 said:
The GSM mode only makes it so you can force the Device into 2g or Edge mode. If you do not want to use LTE just pick WCDMA which is 3g/HSPA+ and GSM(2g/edge). If you are looking to turn off the T-Mobile data part Pull the Sim card out or just put the Tablet into Airplane mode which you can till turn on Wifi. I bought my Note just for Wifi, and using EIP. So i am not using it with T-Mobile Data. getting a data plan on the tablet is a big waste when you can just hotpsot your phone.
Click to expand...
Click to collapse
Well, it turns out that my tablet is defective. T-Mobile is sending me a replacement. I spoke to several tier 2 techs including one Samsung specialist and they all concurred that the band governing 2g on my Note must be inoperative. Weird right?

Well I got my replacement Note in the mail yesterday and it also will not connect to the 2G/Edge network near my house. I highly doubt I could have gotten 2 bad tablets in a row so there's something else amiss here. Perhaps the specs on T-Mo's website is incorrect and this new device simply doesn't have the capability to go to 2G/Edge or the modem firmware being used is a crippled version.
Very disappointed to say the least; yes Edge is horrendously slow but can be beneficial in a pinch sometimes. Any thoughts?

amstel78 said:
... or the modem firmware being used is a crippled version. ... Very disappointed to say the least; yes Edge is horrendously slow but can be beneficial in a pinch sometimes.
Click to expand...
Click to collapse
Yeah, I think you're right; despite unlocking mine and using it on AT&T (which does have better coverage), there's places on my commute where there's 4 bars, yet no data transfer. I've yet to see an "E" or "3G" symbol, either.
I'm thinking about trying to flash the P605M radio, but that'll have to wait 'till the weekend.

kcrudup said:
Yeah, I think you're right; despite unlocking mine and using it on AT&T (which does have better coverage), there's places on my commute where there's 4 bars, yet no data transfer. I've yet to see an "E" or "3G" symbol, either.
I'm thinking about trying to flash the P605M radio, but that'll have to wait 'till the weekend.
Click to expand...
Click to collapse
Please keep me posted on your results if you do end up flashing the modem. I'd be very interested to see what you discover.
I wonder if this move by T-Mo to cut 2g/Edge compatibility has something to do with their rumored intention of converting all of their 2g spectrum to 4g? Even if that were true though, that precludes using this as an unlocked device in other areas or countries that may only have 2g/3g coverage. What about data roaming?

amstel78 said:
Please keep me posted on your results if you do end up flashing the modem. I'd be very interested to see what you discover.
Click to expand...
Click to collapse
Well, turns out that I might put that off a little bit later than the weekend- I've since had mine unlocked and as it gets the VZW LTE bands, I'm going to see how well it does on that (VZW drops back to CDMA in non-LTE areas, so I'd be completely without service). VZW LTE is pretty ubiquitous from what I'd seen with my OG Xoom, but if it turns out I lose service on the train in large spots I'll revisit GSM options again.
Besides, I might just flash the radios just to see what happens