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[Q] HTC One signal drops

Hi all,
I have bought a Htc One M7 handset recently and I have noticed time to time there are No Signals (Limited Service) on it. When I switch off/ switch on or if I turn on the Airplane mode and turn off again, the signals will restore. This is happening around 2 times per day and really annoying. Need to know whether this is a known issue for the model.. I still didn't change the SIM and check. Please help!!!!!
Thanks alot!

Fellow Sufferer
shehanj101 said:
Hi all,
I have bought a Htc One M7 handset recently and I have noticed time to time there are No Signals (Limited Service) on it. When I switch off/ switch on or if I turn on the Airplane mode and turn off again, the signals will restore. This is happening around 2 times per day and really annoying. Need to know whether this is a known issue for the model.. I still didn't change the SIM and check. Please help!!!!!
Thanks alot!
Click to expand...
Click to collapse
I have the same thing
To add some detail for diagnostics see below:
- I travel into London every day and sometimes when signal drops in the tunnels it will never pick back up again after leaving them whereas my old One X did not have this on the same journeys.
- It even dropped out mid call and came up with the sim card icon at the notification bar as if no card inserted (but no selectable notification) first time its happened to this extent.
- Do you have a 4G SIM/connection or are you on 3G like myself? I'm thinking perhaps its something to do with trying to pick up 4G instead and completely disregarding the 3G connection that is available.
- I have also noticed that ever since getting the handset its never had as good signal as my One X which was pretty much always full signal in my normal areas (home, work etc) This may just be the way the handset gauges the signal not the signal itself but something to note anyway.

I'm having the same issue here in the US. It's prolly my only complaint with my phone.
Sent from my HTC One using xda app-developers app

I'm also having this issue but more sever with an all-day no signal. After reboot, I gain signal and I can't make and receive calls.

Try to turn 4G off.

mrcaligula said:
Try to turn 4G off.
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Click to collapse
How does one do that? Having the same problem, both wifi AND mobile network drop off. Wifi comes back on its own after a few seconds, the mobile data connection often comes back (obviously if not on wifi away from home), but the mobile network stays as no signal and doesn't come back, unless I reboot or cycle aeroplane mode. I know there's some problems with touching antenna, but this is happening a lot in the car, when the phone is powered and sitting in a cradle.

bmcconalogue said:
How does one do that? Having the same problem, both wifi AND mobile network drop off. Wifi comes back on its own after a few seconds, the mobile data connection often comes back (obviously if not on wifi away from home), but the mobile network stays as no signal and doesn't come back, unless I reboot or cycle aeroplane mode. I know there's some problems with touching antenna, but this is happening a lot in the car, when the phone is powered and sitting in a cradle.
Click to expand...
Click to collapse
To turn off 4G you go to Settings -> Mobile data -> Network mode and then select "3G / 2G"
don't know if it'll help though, but trying is worthwhile

nkk71 said:
To turn off 4G you go to Settings -> Mobile data -> Network mode and then select "3G / 2G"
don't know if it'll help though, but trying is worthwhile
Click to expand...
Click to collapse
Thanks. The problems seems to have gone with that change. Perhaps it is some system thing kicking me off the network because I don't have 4G on my contract and my phone was trying to get it.
Now, if you can just tell me why my lovely 3-4 bar indoors signal on EE has dropped to 0-1 outdoors (as they deny there is a problem)

bmcconalogue said:
Thanks. The problems seems to have gone with that change. Perhaps it is some system thing kicking me off the network because I don't have 4G on my contract and my phone was trying to get it.
Now, if you can just tell me why my lovely 3-4 bar indoors signal on EE has dropped to 0-1 outdoors (as they deny there is a problem)
Click to expand...
Click to collapse
Are you sure it's not just cosmetic? Try going into Settings->About->Network and see if the signal (dBm) is dropping.
Sent from my HTC One using xda app-developers app

I have it constantly on att - I have to turn on airplane mode and turn it back off to get my network back, I have tried different roms and updates and still the issue is across all roms.

Maybe try this: in your dialer type *#*#4636#*#*. Once the menu is opened, select Phone information, then scroll down to Set preffered network type and choose one of the options (im from Serbia, europe, and I usualy go with GSM auto (PRL)).

Issue with 3g only
Whenever I keep it on 3G, it drops signals for 2 to 7 seconds at random intervals. People often complain that when they call, they get a message that my phone is switched off.. I am probably gonna try another ROM and SIM to see if that helps before dumping this phone forever.

how to solve limited service or loosing service on htc one m7
Hello
it seems to be a hardware fault where the radio is not staying on higher band
it seems to be having issues on 2100 and all umts and hspda or lte networks
however switching back to 2 g can resolve this issue and phone ( hope so) will never lose signals or drop then again
i tried this and for me this works fine so far over 12 hours now no issue
give it a try and see this should work
setting>data>network>2g only
by this you wont have option to use fast internet though but at least you can phone can be used for voice calls messaging etc and also wifi too
I was on stock lolli pop and tried to flash cm12.1 but does not help sort the limited service issue
enjoy and leave your feedback
Edit:
some people cant find 2g in settins>mobile network>preferred network type> lte or 3g only, the solution is go to *#*#4636#*#* phone info>set preferred network type>gsm only( this will put your device into 2g mode)
hope this work

[Q] AT&T 3G signal fluctuates

Just curious on other peoples opinion/theory.
So while using my HTC One on AT&T the 3G signal jumps around. I assume its two towers one obviously being farther away and the phone doesn't seem to stick with the one that's closer. So if i force the phone to connect to WCDMA (3G/HSPA) no celluar service works on the device. Eventually I switch it back to 2G and then it starts receiving calls/sms etc. I have been to locations in the area where there are full bars of 3G constantly yet the phone fails to connect properly eventually I give up and switch to 2G at some points the phone drops down to GPRS.
On an international HTC 8X it maintains a strong connection to 3G/H+ using the same simcard. Only thing that has changed is the actual device. I've tried literally all the radios available for the HTC one and all have the same result.
If using a T-Mobile simcard and I go into an area that has been refarmed I pick their 3G/H+ just fine.
So it's not the simcard and its not the phone. I've called AT&T and all they do is make me turn off the phone while they resend the signal from the tower (so they say) then thats when the phones sticks to 3G and functions correctly but eventually it stops working and returns to how it was.
Right now AT&T offers the stronger call/sms coverage while T-Mobile doesn't so I'd rather stick with AT&T even if they suck.
So my question is.
Anyone else experiencing or has had this issue before on the HTC one or another device? If those who have had this was it resolved?
Was it a simple device exchange or were you bumped up the change of tech support eventually reaching some one who knew how to fix the issue or atlease gave more then "Please turn the device on/off, it will fix all your problems"

How is LTE signal strength?

Just curious, coming from EVO 4g LTE I am really hoping for an improvement in LTE antenna with the m8.

The antenna is better - but not quite as Strong as the G2, N5, or S4. It's about on avg 2-3dBm weaker than the G2, depending on location...on Band 25 LTE. It is however about 8-10dBm better than the M7, according to numerous reports.
The Nexus 5 has by far the best radio on Band 25.

bad signal strength
I don't have numbers to back it up, but what I can tell you is that I have worse signal strength when compared to the M7. I used to toggle back and forth at work between 3g and LTE on the M7, but I never even see an LTE connection at work on the M8. I would also play poker on my break and never have any disconnects on 3g with the M7, but the M8 can't seem to say connected long enough to play 3 hands in a row! I also noticed when I put the M7 and M8 side by side (M7 is connected to another line on my plan now) that I show 5 bars on the M7 and 0-1 bars on the M8! Did I just get a bad phone???

integra3g said:
I don't have numbers to back it up, but what I can tell you is that I have worse signal strength when compared to the M7. I used to toggle back and forth at work between 3g and LTE on the M7, but I never even see an LTE connection at work on the M8. I would also play poker on my break and never have any disconnects on 3g with the M7, but the M8 can't seem to say connected long enough to play 3 hands in a row! I also noticed when I put the M7 and M8 side by side (M7 is connected to another line on my plan now) that I show 5 bars on the M7 and 0-1 bars on the M8! Did I just get a bad phone???
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Click to collapse
Sounds like your a circuit switch fallback victim
Sent from my 831C using XDA Premium 4 mobile app

integra3g said:
I don't have numbers to back it up, but what I can tell you is that I have worse signal strength when compared to the M7. I used to toggle back and forth at work between 3g and LTE on the M7, but I never even see an LTE connection at work on the M8. I would also play poker on my break and never have any disconnects on 3g with the M7, but the M8 can't seem to say connected long enough to play 3 hands in a row! I also noticed when I put the M7 and M8 side by side (M7 is connected to another line on my plan now) that I show 5 bars on the M7 and 0-1 bars on the M8! Did I just get a bad phone???
Click to expand...
Click to collapse
I also have an M7 and an M8. The M8 has a 2-3 dB better signal, but on LTE the number of bars displayed is not accurate. The M7 was like that for a while too until Sprint fixed it with an update. Even with a very strong LTE signal the M8 will show 1-2 bars. That is nothing to worry about.
As for the eCSFB, allegedly only like < 1% of sprint towers still have this problem. Basically if there is a tower with LTE but does not have eCSFB, the phone will deliberately NOT connect to the LTE because doing so would mean that it would not receive incoming phone calls (due to lack of eCSFB).
However, what I've noticed with my M8, is that often, after I drive for a while, the phone will just NOT connect to LTE no matter what. Even in an area with a STRING LTE signal, and working eCSFB, the thing will just not connect to LTE. When it happens it will stay that way forever, until I either reboot it, or toggle airplane mode on and off.
Very annoying. I miss the 2nd radio and SVLTE.

m03sizlak said:
I also have an M7 and an M8. The M8 has a 2-3 dB better signal, but on LTE the number of bars displayed is not accurate. The M7 was like that for a while too until Sprint fixed it with an update. Even with a very strong LTE signal the M8 will show 1-2 bars. That is nothing to worry about.
As for the eCSFB, allegedly only like < 1% of sprint towers still have this problem. Basically if there is a tower with LTE but does not have eCSFB, the phone will deliberately NOT connect to the LTE because doing so would mean that it would not receive incoming phone calls (due to lack of eCSFB).
However, what I've noticed with my M8, is that often, after I drive for a while, the phone will just NOT connect to LTE no matter what. Even in an area with a STRING LTE signal, and working eCSFB, the thing will just not connect to LTE. When it happens it will stay that way forever, until I either reboot it, or toggle airplane mode on and off.
Very annoying. I miss the 2nd radio and SVLTE.
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Click to collapse
I didn't mention this because it did it on both the M7 and M7, but I constantly miss calls (phone never even rings) when I am at work. I hate that my 3g is so bad that I can't even use my phone at work anymore!

i should edit my post to ask users in spark areas if they have been able to connect to spark? on other forums i found some complaining sprint spark was not working well

m03sizlak said:
However, what I've noticed with my M8, is that often, after I drive for a while, the phone will just NOT connect to LTE no matter what. Even in an area with a STRING LTE signal, and working eCSFB, the thing will just not connect to LTE. When it happens it will stay that way forever, until I either reboot it, or toggle airplane mode on and off.
Very annoying. I miss the 2nd radio and SVLTE.
Click to expand...
Click to collapse
I don't think it scans for LTE if 3G is active. So if you're streaming something or an app is syncing it will never pick it up. The default scan rate is set at 300 seconds, not sure if 3G needs to be dormant that long or not though.
Sent from my SM-T217S using Tapatalk

m03sizlak said:
I also have an M7 and an M8. The M8 has a 2-3 dB better signal, but on LTE the number of bars displayed is not accurate. The M7 was like that for a while too until Sprint fixed it with an update. Even with a very strong LTE signal the M8 will show 1-2 bars. That is nothing to worry about.
As for the eCSFB, allegedly only like < 1% of sprint towers still have this problem. Basically if there is a tower with LTE but does not have eCSFB, the phone will deliberately NOT connect to the LTE because doing so would mean that it would not receive incoming phone calls (due to lack of eCSFB).
However, what I've noticed with my M8, is that often, after I drive for a while, the phone will just NOT connect to LTE no matter what. Even in an area with a STRING LTE signal, and working eCSFB, the thing will just not connect to LTE. When it happens it will stay that way forever, until I either reboot it, or toggle airplane mode on and off.
Very annoying. I miss the 2nd radio and SVLTE.
Click to expand...
Click to collapse
Living in Denver where they are FINALLY deploying LTE but in my area it's strong. Also notice the same that it's taking my phone forever to switch to LTE. Compared to my M7, the M8 stays with LTE longer and the speeds are faster.

Opman711 said:
Living in Denver where they are FINALLY deploying LTE but in my area it's strong. Also notice the same that it's taking my phone forever to switch to LTE.
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Click to collapse
This was fixed in the 1.54 update that rolled out yesterday.

[Q] Bad firmware flash effecting 4G connectivity?

My M8 has had pefect 4g and 3g connectivity since I got it. It was a replacement for my first one that was horrible at connecting to anything. Over the weekend I noticed 4g not connecting as frequently as it should, in areas supposedly blanketed by lte coverage in my area.
If I toggle airplane mode, 4g connects and usually stays connected, so it can't be a circuit fallback issue. But when I travel away from that tower, it reverts to 3g and almost never reconnects to 4g until I do another airplane mode toggle.
Is it possible I've mucked up something with a firmware flash? I've flashed the harman/kardon firmware early in the week last week, but since these issues I've tried going back to the stock firmware and also the OTA firmware, but the issue remains.

FlowingAway said:
My M8 has had pefect 4g and 3g connectivity since I got it. It was a replacement for my first one that was horrible at connecting to anything. Over the weekend I noticed 4g not connecting as frequently as it should, in areas supposedly blanketed by lte coverage in my area.
If I toggle airplane mode, 4g connects and usually stays connected, so it can't be a circuit fallback issue. But when I travel away from that tower, it reverts to 3g and almost never reconnects to 4g until I do another airplane mode toggle.
Is it possible I've mucked up something with a firmware flash? I've flashed the harman/kardon firmware early in the week last week, but since these issues I've tried going back to the stock firmware and also the OTA firmware, but the issue remains.
Click to expand...
Click to collapse
I'd go to a sprint store and compare behavior of your with one on display.
Some people believe after firmware updates their M8 started active up. But usually it's loss of 3G. But anything is possible.
But I'd get a reference first. 4G will be available on one spot on my drive to work one day and not the next. Not sure if it's bandwidth thing or tower work or what.
Parameters of when to go on to LTE may have changed in firmware. So it's less likely to bounce between 4G and 3G.

No LTE and delayed SMS

Over the last few days I have had no LTE (Only 3g) and SMS have been delayed getting sent. Im in the Minneapolis area. Anybody have the same issues or have a solutions I can try. I have tried updating the profile and updating the PRL. Any help is appreciated.

My area was riddled with that for months, turns out Sprint was upgrading the towers for circuit switch fall back. A good way to see if this is the case put your M8 in LTE only mode (dial *#*#4636#*#*) and select LTE only. If your connection comes up with LTE then that is the case. I would also try and update your profile and update the PRL sometimes that helps with connection issues.

I tried the Testing mode and get no signal when i put it in LTE mode.

Thats is no bueno, the only other thing I would suggest is calling Sprint and have an engineer check out your towers.