LTE Issues - Galaxy S6 Q&A, Help & Troubleshooting

Hi everyone, today I get my Galaxy S6.
Then I change my SIM card to my new device, the issue is that if I choose LTE/WCDMA/GSM, my S6 only have the less signal and 4G logo, If I choose WCDMA then I Have full signal with 3G, my SIM card was working well in my S4 with 4G before.
Thanks everyone, I Hope you can help me.

Hi
4G always gives much less signal than 3G unless you're very lucky. My LTE/4G gives 1 dot of signal generally, and was the same on previous phones.
Your S4 probably reported the signal bars differently, leading you to believe you had more signal than you had.
I wouldn't worry about it, it's not a fault.

Related

[Q] I get 4G but never 3G? Old sim card

Hi all, I have noticed an odd issue on my G2x that is not a huge problem but I wanted to see if any one had any thoughts on this.
First, I have a very old sim card, it actually has the VoiceStream logo on it. And the lock screen actually lists Vstream sometimes, and sometimes it has T-Mobile/VStream.
I've noticed that I get either 4G or 2G, but never 3G. It's even shown G before. I usually get 4G in my 14th floor office in downtown Chicago outside and some parts of my house, 2G in other places. I've tried speed tests downtown, and I got as high as 12mbps, but usually 5-7mbps. I'm just wondering if there is anything that can be done so I get 3G instead of 2G in certain areas.
Thanks
the phone will never show a 3g logo. It will only show 4g and 2g. And for that mattery t-mobiles "4g" is actually HSPA+ which is the upgraded version of HSPA. they are both 3g technology.

Dual sim and signal lost

Hi there
I recently bought an Alcatel 991d and replaced it a couple of times due to signal loss and sim freezing (no internet, sms, and calls on either the sims). I passed to a Samsung Y duos which is more stable although it seems to still have some signal problem (when this signals is lost it does not come back although a good coverage area is reached, 3g icon disappear and no internet surfing is allowed, sims freezing (rare). With the Alcatel other people experiences serious problems expecially under poor coverage areas and hypothesized the problem could be related to the continuous jumping from 3g to 2g cells. Actually my Samsung y duos goes nice and smooth when I only use the 2g network. Do you think that countinous jumping form 3g to 2g can cause problem to android smartphone in general? Can you think to a solution for this?
thanks a lot!
my friend have similar problems on Gigabyte dual sim phone (I forget model name). didn't found solution yet

Bad network signal / reception?

I was wondering how everyones experience with network signal is on their S6.
I upgraded from an S4 i9505 to the S6 SM-G920F and I notice that the signal to my network is about -5dBm worse on average. It means the phone isn't as good at keeping signal in a low signal area, and it drops from 4G to 3G much more often that the S4 in the same place.
Maybe my antenna is bad or does anyone else experience this?
Also, don't use the signal bars as a judge of your signal. Samsung has changed them, for example they now show 2 bars 4G when my S4 shows 1 bar. Both phones could have -105dBm and the S6 will show 2 bars but S4 1 bar. It makes it look as if the S6 signal is the same or better when in fact the true signal is worse on the S6.
If you want to see your true dBm signal on the S6, go to the dialer and type *#0011# and choose STACK 1. Your signal is the RSRP.
Screenshots attached of S4 and S6, you can see S6 shows 2 bars with -109dBm and S4 shows 1 bar with -106dBm. S4 has a better signal, so don't believe the bars.
Well, i have a couple of flagship cell phone, including 2 motorolas ( Turbo and X 2nd gen) , i thing it might have differences from region to region , but from my experience , Samsung and LG was the ones with bad reception from past experience, S3 , S4 and S5 they were always with a bar or two lower than other phones, and when motorola has only one bar , sammy was with no signal at all ,long time already .
Well, motorola are the best in signal strength for me, follow by HTC. This time sammy has improved, i guess it's the in-house chips or something. Still no Motorola tough .
I guess we notice those things because we live or work in a region that has weak signal so a little bit more or less makes huge difference.
Here is my screen shot right now. The signal bar seems to be accurate with the signal db.
Thanks for the screenshot Galinha1. That's interesting that you find Samsung has improved this time around. I notice that your screenshot has "Ant RSRP Diff" at a minus number (-26) but I've never seen mine in a minus, you can see mine is at 14. I don't know what Ant RSRP Diff means though, any ideas?
If you find that the S6 signal is better than the S4, maybe I have a faulty device?
mupet0000 said:
I upgraded from an S4 i9505 to the S6 SM-G920F and I notice that the signal to my network is about -5dBm worse on average. It means the phone isn't as good at keeping signal in a low signal area, and it drops from 4G to 3G much more often that the S4 in the same place.
Click to expand...
Click to collapse
I have the exactly same experience. The S6 is more agressive drops to 3G. I'm coming from an HTC One M which in my everyday, according to OpenSignal, has 70-80% 4G connection 24/7, the rest 3G.
My S6 has around 30% 4G, 40% 3G and 30% Edge . Because of the great camera in the S6 I have decided to stick with it for now. Sadly. The great 4G signal in my area actually made me stay on 4G all day on the M8 and disregard wifi usage. On the S6 I've falled back to wifi which on my connection is a lot worse than 4G.
I'm really hoping for this issue to be in the Modem/radio firmware and not in the psycially device.
http://forum.xda-developers.com/galaxy-s6/help/lte-signal-indicator-issues-t3083001
mupet0000 said:
Thanks for the screenshot Galinha1. That's interesting that you find Samsung has improved this time around. I notice that your screenshot has "Ant RSRP Diff" at a minus number (-26) but I've never seen mine in a minus, you can see mine is at 14. I don't know what Ant RSRP Diff means though, any ideas?
If you find that the S6 signal is better than the S4, maybe I have a faulty device?
Click to expand...
Click to collapse
Well, i don't know for sure if it's better than S5, it's been around 7 to 8 months i last used my S5 . But i remember that it was a really bad device for signal and call quality. Looks like it's better or is the placebo effect from a shiny new toy . About yours been faulty , well, before last week i would say no for sure, i would assume a firmware or modem software issue, not hardware, but i bought my S6e 2 weeks ago, and i had a lot of drop calls, random reboots , freezes ,and people complaining that they call me and the phone rings once or twice and hung up , and in my end i never saw that attempt of calling, so i tried a new firmware, updated, downgraded it.. still having issues. So i went to my carrier and they didn't even let me finish my complains and handed me a new device. I went back home , thinking that couldn't be hardware issue and this new one would have the same problems. But now it works as it supposed to do . So i guess they might have a lot of faulty devices and software issues for those initial batches . Although i still have some drop calls, and 3g or 4g drops , is not that noticeable like it was before.
I have no idead what ANt RSRP Diff means.
I hope you solve your problem, anything i can help you let me know.
better than my old nexus 6 and m7. plus it holds onto lte much longer
I also have issues with cell reception. I'm on att, and although in areas where signal is strong there are no issues, I have serious issues maintaining a cellular connection when the signal is mediocre. I'm at my wits end with this. The phone seems to run fine, no issues besides the fact that I don't get signal in many areas that my old Nokia lumina 930 had no issue getting reception. Also, ive compared with a few friends iphone 6's and they have signal while my s6 will have nothing. I will be bringing the phone in tomorrow, but if anyone has any other suggestions to fix this besides factory reset, which I've already done, I'd appreciate the help.
I also had problems with cell reception. (no signal, drop calls)
As suggested on several forums I changed the network mode in settings to WCDMA/GSM and this seems to solve the reception problems. This way I am not be able to use 4G but at least I can make calls now XD
hnos said:
I also had problems with cell reception. (no signal, drop calls)
As suggested on several forums I changed the network mode in settings to WCDMA/GSM and this seems to solve the reception problems. This way I am not be able to use 4G but at least I can make calls now XD
Click to expand...
Click to collapse
Well looks like it's many more of us than I thought... I am on EE and reception is a joke ( joke anyway on EE) but with S6 reception is much weaker than on any previous phones I've had. What firmware r u running
misiokicio said:
Well looks like it's many more of us than I thought... I am on EE and reception is a joke ( joke anyway on EE) but with S6 reception is much weaker than on any previous phones I've had. What firmware r u running
Click to expand...
Click to collapse
I am on stock 5.1.1 G925FXXU2BOFJ
I believe the version is the same for the G920F
Just came back to Verizon after being with T-Mobile for a year. Signal is pretty much the same at the house as I has always been.
click for larger image
Around town it is normally pretty good. At work, it is much better than T-Mobile ever was.
S4 has better 4G signal then S6
This seems to be a problem world wide. Looks like Galaxy S6 is having issues with 4G. I compared it with my old S4 and it's way worse.
Here are the results.
S4- 4G inside the house signal: -109dBm 31asu
S4 - 4G outside the house signal: -102dBm 35asu
S6 - 4G inside the house signal: NO SIGNAL
S6 - 4G outside the house signal: -113dBm 0asu
On my S4 I'm getting a better signal inside the house than what I get on the S6 outside the house.
Does anyone know the reason for this and is there a fix?
4G is calculated differently than a 3G signal
4G: (113 is good, 140 is bad)

[Q] Signal Strength

What kind of signal strength are others getting compared to other phones they have owned. When I am in an area that has excellent LTE coverage (as consistently shown on multiple other phones I have owned) I am only getting about one half to 3/4 of the signal I had been getting. I have yet to get a full strength LTE reading on the signal strength indicator. I am also having problems with the signal dropping completely (no service) and then coming back at 3/4 strength? Very flaky.....
My AT&T signal was always terrible. Almost always 1 bar but sometimes two. I preordered a H2O Wireless SIM about a week before I got the Idol 3. My AT&T plan expired the day after I got the phone so I just popped in the new H2O sim into the idol 3. With the H2O sim I get really good signal, sometimes full; bars! The weird part is that H2O uses AT&T towers so I can't explain why I am getting better signal except that it could be the phone. Unfortunately I was unable to compare the same sim card in both phones. Overall signal strength is better for me.
Shodan5150 said:
My AT&T signal was always terrible. Almost always 1 bar but sometimes two. I preordered a H2O Wireless SIM about a week before I got the Idol 3. My AT&T plan expired the day after I got the phone so I just popped in the new H2O sim into the idol 3. With the H2O sim I get really good signal, sometimes full; bars! The weird part is that H2O uses AT&T towers so I can't explain why I am getting better signal except that it could be the phone. Unfortunately I was unable to compare the same sim card in both phones. Overall signal strength is better for me.
Click to expand...
Click to collapse
i got the same problem i had a moto G lte had all of the bars then i put in my sim card and now i dont get much signal even at work with the moto i had all of the bars and this one i get like half then dissapears goes back to half then of a sudden all of the bars show im running cricket and as same as you we run on ATT towers
I had to set mine to wcdma/gsm on T-Mobile to get good coverage. It wouldn't pull signal unless it was 5 bars LTE.
Tmobile in SF. Brand new phone less than a week in use, also terrible signal. LTE Discovery shows I'm on band 4. Funny enough I still get calls and txt messages when displays shows not signal at all. This is one thing I hate in reviews, they all mention how fast and great display and audio, but none of them mention call reception. IT'S A FREAKING PHONE!!!
My signal sucks regardless of this being a Band 12 capable phone. I know you should never go by the signal bars, but rather the dBm's/asu, but my signal strength fluctuates constantly and doesn't even show signal at all until a few seconds later as if it "reconnected" to the network and jumps 2 bars. This phone needs a major modem update. I don't think I've ever seen my signal bar icon fully lit even when I'm outside. Maybe I just need a new SIM card.
My network is fine. AT&T/AIRVOICE. SLC, Utah.
I compare my Idol 3 signal to varying Androids i know that are on Tmob, it seems to be par for the course. Often it is half a bar better. It is certainly better than the OPO i sent back.

question about cell radio signal

Hi guys recently I bought an unlocked g955u1 from best buy and am on Verizon. I've noticed that my cell signal has been reading a bit off despite doing the Verizon software update. My phone is almost always stuck on 3 bars lte according to lte discovery and the range of dBm will average -100 to as low as -108 which realistically should be 1-2 bars not 3. In the past the only time I've really saw inaccurate readings like this is when I've been on gsm carriers. It's not as much as a problem as more of an annoyance as everything works fine. My question is anybody know why it's reading so inaccurate?
The bars are more or less just approximate visualizations of the network strength anyway. It varies from carrier to carrier, as well as phone manufacturer. You're better off sticking with the dB display if you want a truly accurate reading. Imho.
I have a T-Mobile variant and have noticed the my DL and UL speeds are a lot faster than any of the phone I've had in the past. We live out from town and even on the Nexus 6 it shows 3 bars and on the S8+ I get all the bars and the DL speed on the other phones at my house are around 5Mbps and on the S8+ I get 17-20Mbps at the house now. In town it has gone up from 40Mbps to 55Mbps.
My ATT S8+ reception
While I agree that the dBm is what you should be looking at, I have noticed some funky things going on with my ATT S8+ in terms of reception. Using the same SIM card, placing the phone in the exact same place, my S6 Active has a signal strength of -124 dBm /asu 16/"In service" on LTE. The S8+ gets a signal strength of -113 dBm/asu of 0/"Out of service." To me this seems like the S8+ is actually getting better reception than the 6S Active but the phone is out of service. I also tried this same test in another location using a different cell tower. Same results, the S8+ gets better reception...but the phone does not perform as well. In location number 2 I have also notice the S8+ fish for better signal and switch from LTE to HSPA where the signal strength is -99 dBm but the asu is only 7.
Since I live in a area with weak cell coverage the S8+ is driving me nuts...I contacted ATT about it last night, will see what happens.
Also somewhat related:
I'm using a US Unlocked on T-Mobile, and I've noticed my signal dropping out in areas where I previously had great signal on my Pixel XL. My buddy (also on T-Mo) just got an LG G6 and had full signal when mine dropped out.
Anyone else notice a weak signal? If I flash the T-Mo firmware, will that improve my signal? Did I get a bad unit? I hope not as everything else is perfect, screen included.
i notice (with TMobile) that if i am in 4g lte, then move to area with only edge for a few mins, then back to the 4g lte area...my phone doesn't connect back to the best signal
only a reboot let's me reconnect to 4g lte

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