Develop Bugs

[Q] Low wifi signals

Has anyone noticed low wifi signal.
I tested standing next to my wifi router with my:
old HTC Desire: 100% wifi signal
new Galaxy Nexus: 70% wifi signal.
Walking a few steps back the Nexus drops to 50%, Desire stays at 100%.
Anyone else?

Same here, worst signal I've ever hand in a mobile for WiFi. Only really a problem when I'm quite far from the router with walls in between, still though, none of my other handsets had this problem.

neillh said:
Has anyone noticed low wifi signal.
I tested standing next to my wifi router with my:
old HTC Desire: 100% wifi signal
new Galaxy Nexus: 70% wifi signal.
Walking a few steps back the Nexus drops to 50%, Desire stays at 100%.
Anyone else?
Click to expand...
Click to collapse
Same here. Was just searching for some update here from xda guys i'm sure i saw something in the past days.

me too, wonder if this is just a GN thing or affecting just some of the phones..... sigh.

cjeremy said:
me too, wonder if this is just a GN thing or affecting just some of the phones..... sigh.
Click to expand...
Click to collapse
i think overall this is the worst reception I have ever had on a cell phone. Its really the first one thats ever given me a problem in my house. Constantly drops to 1 / 0 bars which is like -107 to -111 dbm but i pop in simcard into my 4s and its at -87 dbm. Same type of thing with wifi as well.
I have tried other radios and it seems that UGKK7 radio works best for me on ATT.
Ive tested the UGKL1 for just an hour or so and this one may be the best yet for me. TO early to tell though. I can say that im on full bars for both wifi and hspa for the first time at home with my GN. Just curious if it will hold though. Usually it ends up dropping and not recovering.

GSM bug XXKK6/UGKL1/XXLA2 radios on T-Mo: switch to 2g = 3mbps cap down when 4g again

This affects both the XXKK6 and UGKL1 radios.
I've opened up a bug ticket for this issue here:
http://code.google.com/p/android/issues/detail?id=25316
From my ticket:
The steps to reproduce are:
Boot the phone with radio in normal mode (NOT 2g only)
- Speed tests will regularly pull down 5+mbps and 2-3mbps up
Switch the radio into 2g only mode
Switch the radio back to normal mode
- Note: I've waiting 1 hour, 15 minutes, 10 minutes, 3 minutes, and 1 minute in between with same result
After the last switch, data speeds on downstream won't go much past 3mbps (most I saw was 3.04). Interestingly though, the upstream improves to 3.5mbps at some points.
Like I said; EVERY time I boot the phone and run a speed test, I get great data speeds, and then after switching to 2g and back to 4g it gets stuck at 3g.
I've attached a spreadsheet (internal IP and latitude/longitude removed so I don't advertise my location at such a precise amount) that color codes the data immediately after booting the phone (green) and after doing the switching mentioned above (red).
Click to expand...
Click to collapse
I'm willing to bet that this has some relevance to the number of people who are seeing <3mbps per second on their handsets. Many of the people who are getting great speeds are probably in areas where the 4g connection doesn't cut out.
UPDATE: From what I can tell, this doesn't happen as a result of your radio switching to 2g in an area where you aren't getting 4g reception, but I want to test more to see if there are conditions where this does happen.
UPDATE 2: This bug also affects UGKL1. Spreadsheet attached.

ChazzMichaelMichaels said:
I've opened up a bug ticket for this issue here:
http://code.google.com/p/android/issues/detail?id=25316
From my ticket:
I'm willing to bet that this has some relevance to the number of people who are seeing <3mbps per second on their handsets. Many of the people who are getting great speeds are probably in areas where the 4g connection doesn't cut out.
Click to expand...
Click to collapse
Does this happen when it auto-switches? i.e. if the phone switches to 2g and 4g or is it possible it's an issue related to a user initiated switch.

From what I can tell so far, it doesn't happen on auto-switch.
Typically at my house my phone doesn't get continuos 4g service and will drop down to 2g for minutes at a time. This happened today on a quick stop home from work, and upon returning to work I still had speeds over 3mbps.
I still want to try some other scenarios. I know my basement is particularly bad for 4g connections, so I'm going to try starting my phone in normal radio mode in the basement to force it to hit 2g and then do a speed test in an area where I know I can hit reasonable downstream levels.
I attached a spreadsheet to the op with data from UGKL1 as well, which also has the bug.

I'm running 4.0.2 stock with XXKK6 and I can confirm that it does not happen with auto switch between 2G to 4G. I drive regularly between Austin and Houston and GN switches between GPRS to Edge to 3G to 4G. I clock up to 5.5 mbps once I get back to Austin.
Sent from my Galaxy Nexus using XDA App

Yep, same happens to me on XXKK6 radio T-Mo US yakju firmware. I was getting 4-5mbps down / 1-2mbps up (a little lower than my usual speeds), then toggled 2G only and back again, I get about 2-2.5mbps down / .5-1mbps up. Ping times also got higher by about 50ms.
Adding star and comment to your bug ticket.

I had this problem as well with some of the newer basebands but flashing UGKK7 solved it. I can still achieve speeds of 5mbps+ even after toggling between 2g and 3g

Interesting; I never saw that radio because my phone OTA'd to 4.0.2 as soon as I unboxed it. Do ITL41D radios work fine with 4.0.2 and 4.0.4?

On UGLC1 switching to 2G only then back to 3G replicates this issue also. Download speeds lock tight around 3.11Mbps where I usually get 7-8.

so which radios aren't affected by this bug?

ceejay83 said:
so which radios aren't affected by this bug?
Click to expand...
Click to collapse
Its not radios. One of the workarounds involve something that manages CPU throttling/voltage. I think. Don't quote me on that. So it is believed it is a software bug, not radio bug.
zippity doo da.

@rbiter said:
Its not radios. One of the workarounds involve something that manages CPU throttling/voltage. I think. Don't quote me on that. So it is believed it is a software bug, not radio bug.
zippity doo da.
Click to expand...
Click to collapse
i know the CPU/voltage throttling causes the dropped signal bug, so it also causes the bug in this thread?

ceejay83 said:
i know the CPU/voltage throttling causes the dropped signal bug, so it also causes the bug in this thread?
Click to expand...
Click to collapse
not sure. i doubt it because of the cap on bandwidth. not the complete data and/or cell signal loss. but it can't hurt to try the smart reflex workaround. never know.

Quick update to this issue: a friend of mine at work just bought a GNex from the Google Play Store and it has the exact same problem.
His phone is also on T-Mobile, and he's running the stock build for the phone. Reproducing it was completely straightforward, run speed test on 4g for 6mbps down, switch to 2g and back to 4g, run speed test for 3mbps down.
Also of relevance, this issue can be resolve by turning data off on the phone for a few seconds and reenabling it.

ChazzMichaelMichaels said:
Interesting; I never saw that radio because my phone OTA'd to 4.0.2 as soon as I unboxed it. Do ITL41D radios work fine with 4.0.2 and 4.0.4?
Click to expand...
Click to collapse
I don't know. I was just flashing different radios and replicating the issue until I found one that didn't have it.
ceejay83 said:
so which radios aren't affected by this bug?
Click to expand...
Click to collapse
UGKK7 is one..
@rbiter said:
Its not radios. One of the workarounds involve something that manages CPU throttling/voltage. I think. Don't quote me on that. So it is believed it is a software bug, not radio bug.
zippity doo da.
Click to expand...
Click to collapse
That was for the wake-up bug where the signal dropped completely whenever the phone went to sleep. It was solved with the latest 4.0.4 update
ChazzMichaelMichaels said:
Quick update to this issue: a friend of mine at work just bought a GNex from the Google Play Store and it has the exact same problem.
His phone is also on T-Mobile, and he's running the stock build for the phone. Reproducing it was completely straightforward, run speed test on 4g for 6mbps down, switch to 2g and back to 4g, run speed test for 3mbps down.
Also of relevance, this issue can be resolve by turning data off on the phone for a few seconds and reenabling it.
Click to expand...
Click to collapse
I do that too sometimes to restore data but it is inconvenient/annoying.
Going to the #*#*4636*#*# menu and turning off the radio also helps
I wish Google or whoever makes the baseband radio would fix this because it's inconvenient and sucks to go from 6-9mbps speeds to 3mbps lol

I'm on aokp m5 with trinity tried kk6 and uglc1 and my phone constantly switching from 3g to H and my data hangs even with full bar data will hang several times and sometimes drop is this the same issue
Sent from my Galaxy Nexus using XDA Premium App

Intermittent phone signal

I've had my HOX now for just over a month and i'm loving it. One thing that is slightly bugging me is that occasionally the phone signal will completely cut out giving me an 'x' where the signal strength normally is and telling me that I can only make emergency calls only.
This will correct itself within 30 seconds or so and go back to giving me a signal. This doesnt happen all the time which has made it harder for me to diagnose. Do you think it is a problem with the sim card (Orange UK network) or is it likey to be an issue with the radio software?
I never had an issue with Orange on my Desire although this is a different SIM card.
Any help or advice would be appreciated.
Thanks

I think this is a common problem I'm on Vodafone and this happens to me. I applied a fix when installing insertcoin Rom a while back and it doesn't do it as often now.

I'm glad this has been mentioned now because my One X (On Vodafone) drops connection all the time. The amount of times that I have been somewhere and needed to transfer money through the Natwest App and haven't been able to is getting annoying now. As I am not rooted I can't try any fixes but I have found by using GSM only around where I live, it won't drop signal half as much or often. I don't have a 3G mast near me so its always dropping connection switching between the two as opposed to a smooth transition.

Hi,
You are not alone. I'm on Orange UK and have seen this problem on quite a few occasions. Unfortunately, as yet I can't see any pattern to understand when it happens or what causes it.
Tim

Happens to me on 3. Sometimes I have to hard reset to get it back.

Glad that its not just me. At least I can rule out an issue with the sim.
As it seems to cover more than 1 network, could it be a radio issue that is addressed in a future firmware upgrade?

It is definitely not just you. I'm in Malaysia on the Maxis network and have this problem as well. It happens randomly - at the most it happens twice in a day.
Do you also sometimes get the message 'Preparing SIM card...' at the bottom of the screen?
I brought my phone to the HTC service centre and they offered to take it in to test the radio. I will do this when I get back from my holiday and keep you guys posted!

Mirlina said:
It is definitely not just you. I have this problem as well and it happens randomly - at the most it happens twice in a day. Do you all also get the message 'Preparing SIM card...' at the bottom of the screen?
I brought my phone to the HTC service centre and they offered to take it in to test the radio. I will do this when I get back from my holiday and keep you guys posted!
Click to expand...
Click to collapse
I do get that message at the bottom of the screen. I'd be interested to hear what the outcome is once you've had your radio tested.

Yep, it's the [email protected] radio firmware HTC has provided us with. Radio 2.05 is much better. HTC are useless with updates. I've had problems with my network connection for 2 months!

an.d.d said:
Yep, it's the [email protected] radio firmware HTC has provided us with. Radio 2.05 is much better. HTC are useless with updates. I've had problems with my network connection for 2 months!
Click to expand...
Click to collapse
Only slightly IMO not sorted properly. (t-mobile uk)

XsCode said:
Happens to me on 3. Sometimes I have to hard reset to get it back.
Click to expand...
Click to collapse
Me too.
Except I am on Tim @ Brasil.

This is nearly always down to signal.
If you're in an area that has decent 2G signal but fluctuating/low 3G signal then the phone will keep trying to connect to the 3G signal. Sometimes it'll be too weak and not be ableto connect and will stick with the 2G signal. If the 3G signal is only just strong enough to connect the phone will switch to 3G mode (dropping the 2G signal). Then it'll realise that the 3G signal is too weak to do anything with (showing an 'X' in the signal area) and drop back to your full 2G signal.
3G signal is breathable which means that if lots of people are connected to the 3G mast then it's signal area (i.e. distance from mast) is reduced. If no-one is using the 3G mast then it's area is bigger.
Perhaps your signal is breathing in and out of use where you are.
Obviously the radio can have an affect too, but with so many people using the same radio software there are going to be some it works well for and others it doesn't.
Personally, I keep my phone on 2G/GSM Only for most of the time and then switch to 3G when I want to use data. I hardly ever get problems with signal, and if I do I shrug and put it down to the coverage in the area I'm in.
P.S. Saying this, my 2G signal seems to drop in and out when I have WiFi turned on. Usually when I'm using wifi I'm not making calls anyway so it doesn't bother me...

Thanks for this useful info. How do I set my phone to 2g only so I can test this theory out ?
Sent from my HTC One X using xda app-developers app

bobsie41 said:
Only slightly IMO not sorted properly. (t-mobile uk)
Click to expand...
Click to collapse
It seemed 'good enough' to me, but I only had 2 days with my phone on 2.05 and then my camera wouldn't work at all. So I sent the phone back for a replacement. Crazy it's still not fixed!
I've had 5 faulty phones now.

Hi
r2b2 said:
This is nearly always down to signal.
If you're in an area that has decent 2G signal but fluctuating/low 3G signal then the phone will keep trying to connect to the 3G signal. Sometimes it'll be too weak and not be ableto connect and will stick with the 2G signal. If the 3G signal is only just strong enough to connect the phone will switch to 3G mode (dropping the 2G signal). Then it'll realise that the 3G signal is too weak to do anything with (showing an 'X' in the signal area) and drop back to your full 2G signal.
3G signal is breathable which means that if lots of people are connected to the 3G mast then it's signal area (i.e. distance from mast) is reduced. If no-one is using the 3G mast then it's area is bigger.
Perhaps your signal is breathing in and out of use where you are.
Obviously the radio can have an affect too, but with so many people using the same radio software there are going to be some it works well for and others it doesn't.
Personally, I keep my phone on 2G/GSM Only for most of the time and then switch to 3G when I want to use data. I hardly ever get problems with signal, and if I do I shrug and put it down to the coverage in the area I'm in.
P.S. Saying this, my 2G signal seems to drop in and out when I have WiFi turned on. Usually when I'm using wifi I'm not making calls anyway so it doesn't bother me...
Click to expand...
Click to collapse
Which is correct, however any phone working correctly should manage to switch between 2G/3G without problems, i.e. you should not find the phone without a signal at all provided there is 2G coverage, which seems to be the case being reported here. My previous phones with 3G/2G never had a problem, and the HTC One X has been no different for me, it hasn't dropped it's signal, I'm on Vodafone in UK.
Regards
Phil
---------- Post added at 09:40 PM ---------- Previous post was at 09:38 PM ----------
Hi
craggybuk said:
Thanks for this useful info. How do I set my phone to 2g only so I can test this theory out ?
Sent from my HTC One X using xda app-developers app
Click to expand...
Click to collapse
Settings -> Mobile Network -> Network mode then set to GSM only.
Regards
Phil

This is happening fairly regularly for me on UK T-Mobile. Seems to happen when switching between Orange and T-Mobile or T-Mobile and 3G T-Mobile. I've got a ROM that distinguishes between a 2G and 3G connection in the carrier name area.

bailie1912 said:
I think this is a common problem I'm on Vodafone and this happens to me. I applied a fix when installing insertcoin Rom a while back and it doesn't do it as often now.
Click to expand...
Click to collapse
What fix was that?

OliverHaslam said:
What fix was that?
Click to expand...
Click to collapse
Installing a Custom ROM

nickhuk said:
Installing a Custom ROM
Click to expand...
Click to collapse
Which, and what about it was supposed to be a fix? I'm using MaXimus 2.1.

It happens to me also. I'm on 3 in Denmark. They providing only 3G coverage in area. So far, I figured out that it's happening when I'm loosing signal completly (i.e. when I go down in concrete basement), and when I'm within coverage again, phone is unable to register on any network at all. Sometimes can help turn airplane mode on and off, or sometimes I have to turn phone off and on again.
ROM : 1.29.401.11
Radio: 1.1204.105.14

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] LG G3 Three UK Signal Dropping

Hi all,
Is anyone else experiencing terrible signal on Three UK? My dad just got his G3 and compared to his Nokia 925 signal on Three is atrocious, and seems to drop in an out constantly?
Anyone else experiencing the same?

Not on 3 but I'm on ee (T-Mobile) and I have some prob outs at times that I found has been bit strange but most the time I have great signal.

I am on Three, had no signal concerns at all except in areas of weak signal. The phone doesn't seem great at maintaining a connection when signal is weak, whereas other phones might stay with 1 bar this drops to none, but otherwise signal is as good as can be expected.

No problems here
Sent from my LG-F400L

I have had this problem on 3 UK. I found that going into network settings and choosing the network mode without LTE stopped it from happening! Any idea why this may be anyone? Do we have defective units?
Matt

The g3 is just very slow at finding signal when its lost signal - what is happening is you are losing signal (even if just a split second), any other phone would probably instantly reconnect but the G3 seems slow - this is all software based (well, radio firmware) and can be fixed (and word on the street is that it will be fixed in the next, August, release).

Lennyuk said:
The g3 is just very slow at finding signal when its lost signal - what is happening is you are losing signal (even if just a split second), any other phone would probably instantly reconnect but the G3 seems slow - this is all software based (well, radio firmware) and can be fixed (and word on the street is that it will be fixed in the next, August, release).
Click to expand...
Click to collapse
Thanks for the info, I won't be sending this off any time soon then! Also thanks for your unroot and chromecast volume fix guides they have been very helpful.

Wouldn't enabling fast dormancy help to find the signal quicker if it loses it?

I have also seem a connection problem on three in the UK. I figured switching off lte stopped it happening so much but then again I get 4G free and three tell me I have good signal strength for it so it seems silly to turn it off. Having said that I haven't seen it pop up once yet. Anybody tell me what the signal icons are on the G3, I have only had H so far? Cheers
Sent from my LG-D855 using XDA Free mobile app

stigslim said:
I have also seem a connection problem on three in the UK. I figured switching off lte stopped it happening so much but then again I get 4G free and three tell me I have good signal strength for it so it seems silly to turn it off. Having said that I haven't seen it pop up once yet. Anybody tell me what the signal icons are on the G3, I have only had H so far? Cheers
Sent from my LG-D855 using XDA Free mobile app
Click to expand...
Click to collapse
I haven't seen the 4g logo yet either as I live away from any LTE areas, I've seen H and H+, 4g will show up as either LTE or a 4g symbol so I assume that your phone isn't connected to LTE/4g if you haven't seen either of those

Yep that's what I figured. Tweeted three cs but didn't seem to get much help. Thought maybe it's because I'm a SIM only customer. But I have checked there website and to all intents I should be connecting. 4G is good on my area. Not sure what else to try?

Enable fast dormancy for the 3 network. 4G works great on 3 in cities where it is supported.

How to enable fast dormancy? Website gives my area a good signal. I don't even get H+ which I did with my galaxy s3.

stigslim said:
Yep that's what I figured. Tweeted three cs but didn't seem to get much help. Thought maybe it's because I'm a SIM only customer. But I have checked there website and to all intents I should be connecting. 4G is good on my area. Not sure what else to try?
Click to expand...
Click to collapse
Have you tried the options when you enter 3845#*855# into the phone ? I had to use this as I was not getting LTE. See here for more info http://forum.xda-developers.com/lg-g3/general/mod-root-activate-lte-g3-t2819387

The option its already in my network settings menu and switched on. Are these different? Just can't put my finger on it.

I am having the same issue with my LG G3 on Three, the signal is much worse than my galaxy S3. Drops out randomly in my house and then takes ages to get a signal again.
Wondering whether to send it back our not as a phone with bad reception is kind of pointless! Anything perhaps fixable with a new firmware for the radio?

Yep exact same issues. Hoping it's not the phone (bought it myself not from three) really like it and Up to now three was great ? gutted.

It seems the phone either had really good or really bad reception. In poor area's it's quite flaky and can drop out easily when moving between rooms or even how you hold it.
If the reception is good you can get some great speeds on 4G though. Hoping they fix the issues with low signal strength soon as it's quite annoying.

Had a text from three saying they were going to fix my issue within the next seven days. Not picked up a 4g signal at all yet. So watch this space.

I also had problems with signal. I got a replacement SIM & that seems to have improved matters.