[Q] Weak or no signal on GTI9100 - Galaxy S II Q&A, Help & Troubleshooting

Recently my provider signal got so weak that now if I am indoors the signal is gone until i go outside. Tried to upgrade via Kies to ICS but the problem persists.
When I stick a small piece of wire in the external antenna connection, my signal goes to full and is perfect!? Is this a hardware or a software problem?
It seems that the internal antenna is not responding because as soon as I remove the wire the signal is gone or is minimal.
For now I keep the wire connected behind the cover and the phone is usable.
As I can see this is a common problem and many complaints are posted on this topic all over the place.
Can anybody help? Thanks in advance.

http://forum.xda-developers.com/showthread.php?t=1273292

Internal antenna
Thanks for the link,
Unfortunately I made a mistake by trying to connect an external antenna, not being aware of the consequences. Reading the posts it looks like I will have to bridge the external antenna socket and connect it directly.
Time to bring out the soldering gun and get to work.
I will try a few other options in the meanwhile.
Sh.. happens, anyway thanks for the help, regards...

Related

External antenna for wifi ?

Anyone know of a possability to have an external antenna for wifi or anything else that would help increase or focus the signal to get a better/further wireless connection ?
Any ideas are welcome even if it means working (soldering) on the actual board of the Tytn if anyone has done something similar please post your findings here.
Tytn has an external antenna connector under a little cover on the case. Wilson sells antennas and cables and such for it, plug and play.
http://www.wpsantennas.com/
Thanks for the reply Bro, but will this boost the wifi module or just the phone signal ?
Just the phone signal as far as I've read. I'm not sure though.
I'll be trying it out as soon as mine gets here and I can let ya know, I need one for trying to get reception in the rural areas I go to often.
I have read somewhere on this forum that using the atennas that plug into the port on the back are a bad idea in these phones cuz the soders on the board break easily if you do and you lose all phone signal. I couldnt find again where I read it, sorry. So be careful if you do it.
Thanks for the heads up bro, I don't mind the phone signal (aside from tunnels) but I do want to boost the wifi, I guess we're stuck with this till a better phone comes out
im sure you could maybe, make some freak monster connector for the wifi antennas? nobody has done that? isnt there some basic internal one? or how does the wifi signal get broadcast/received?
yeah its possible but I don't want to fry the board if I put something that draws more power than the board can handle (because it sends and recieves) so I wanted to see if some electric engineer or hobbyist has ventured something like this before
your better off with some wrt54g(s) with ddwrt on it and use it to connect to it and then use the wrt54 to connect to whatever it is that you want for range lol i dont know in what situation your in... if its portable then ya the router thing would not work well if in car? or some other place then that would be the best choice heh
but if your connecting external antenna then its not really that portable anymore is it
Sounds interesting... thanks for the info I look into that,
I have no problem at home or at Uni but in hotels I usually have to point the device around to catch a signal (heads up that's where the base for wifi is) and the signal is so weak it disconnects or gets real slow somewhat annoying, still better than carrying a laptop around on small trips.
i'm willing to open mine up for better wifi, i would just like a guide or atleast some pictures and pointers with do's and don'ts.
i don't NEED my hermes, but i do love it enough to want it to continue to operate.. heh.
I took mine apart already i wanted to put the bestskinever on the screen its self so while doing that i was going to check out the insides and it was a pain to get it on without any lint and stuff on still got a very small one but its nice i cut the exact size of the whole LCD not the screen dimensions
so it covers it all... anyway
i saw both BT and WIFI internal antennas there... I really did not see any connector... though something that looked like one but i didnt pay much attention it was very small maybe .200" or so
I would assume you could un solder the internal wifi antenna but i would not recommend that... as there are i believe other resistor/capacitor and hmm coil that work for the right antenna length and so on... I THINK I havent done any electronics in a long time and never bothered with such devices and or high frequencies so I would not know.
I would recommend finding some other online forums dealing with the 2.4ghz wifi stuff and learn or ask questions if its possible to make a connector for the phone.
This would be indeed a great DIY project to add to the archives
once again i would recommend that you get a cheap wrt54 put dd-wrt on it... config it properly for it to connect to other devices, they even have scripts to have it connect to open connections and the ones with strongest signal or you could config it manually through the web gui
that is far better IMO then modding your hermes heh, as i would think you would need an amplifier not just external antenna as that only might increase your sensitivity or a little better quality in signal but to boost the transmit power you would need an amplifier
http://dd-wrt.com
there you go find the right one with the right version that will work with dd-wrt they only run like 50 bucks or so… and plus you can use it for anything else… you can boost the transmit power on them as well as replace the generic antennas

Short Question to Hardware Geeks

Hey. can anyone tell me what hardware that is? Is it the GPS?
http://q24.img-up.net/?up=IMG_201204xttc.jpg
Factory signal test point for one of the radios. Probably cell or GPS. All phones have at least one of them.
Not for public use!
AFAIK it is the auxiliary aerial/antenna connector.
my xperia play has the same thing but the connectors to the antenna is broken. could this be because of this my gps doesn't find any satellite? I still got phone/data etc.
Whatever you do, don't try plugging anything into it. I have heard of people experimenting by plugging external antennas into that port, which ended up causing COMPLETE signal loss afterwards.
It seems if you plug something into that port which is not meant for it, then it may or may not end up breaking an internal connection for the antenna.
I say may or may not, but I, for one, would NOT want to risk it.
Internal antenna

[Q] Hardware issue - Antenna - Poor reception

Hello guys,
I'm having a reception issue with my beloved S2. In my opinion it is a hardware issue, because when I connect some wire to the external antenna jack at the back of the phone (that connector at the left of the sim card, just above the battery), the receptions improves.
Does anybody know where S2 antenna is at? Can it be replaced?
Note: I'm using the original USB-flex. I know it messes up with the reception when it is replaced.
Thank you in advance

HELP: mi box 3 wifi randomly turns itself off

not sure why this is happening but i noticed my mi box is not working
then when i go into setting i see that the wifi is turned off in wifi setting i have to switch it back on
it is getting really annoying since i use this box to run some smarthome bridge apps
not sure why this keeps happening ,the box is right next to my router and is connected to the 5ghz band
so it should not be dropping the connection
but lets say it is dropping the connection ,then why if the wifi turned OFF ? if it drops won;t it just reconnect automatically?
are there any hidden setting i can check or change to correct this or is there some app i can sideload to fix it?
gdroid666 said:
not sure why this keeps happening ,the box is right next to my router and is connected to the 5ghz band
Click to expand...
Click to collapse
Signal overload? Try moving them at least a few feet apart? Only SWAG I got. Other than have you tried a factory reset on the MiBox?
jseymour said:
Signal overload? Try moving them at least a few feet apart? Only SWAG I got. Other than have you tried a factory reset on the MiBox?
Click to expand...
Click to collapse
no don't want to factory reset it
it took days to get anymote setup on it was the biggest hassle ever
no way i am going through that again
yeah it is like a foot from the router
but the thing is if it dropped wifi then isn't it supposed to reconnect on it's own or at the very least not switch the wifi to off on the settings?
Signal overload can sometimes have odd effects on hardware and the software that drives it. E.g.: Got a guy over in the Silicon Dust forums had a HDHomeRun device crashing on tuning a particular channel. He put a splitter in-line to allow him to do A:B comparisons with another device on the same antenna and the problem went away. (Splitters introduce a >1/N signal strength loss.)
jseymour said:
Signal overload can sometimes have odd effects on hardware and the software that drives it. E.g.: Got a guy over in the Silicon Dust forums had a HDHomeRun device crashing on tuning a particular channel. He put a splitter in-line to allow him to do A:B comparisons with another device on the same antenna and the problem went away. (Splitters introduce a >1/N signal strength loss.)
Click to expand...
Click to collapse
but HDMI is a wired connection
wifi is wireless can
and does android really turn the wifi off if signal overload?
it did it again today i am thinking of just looking for a workaround
like maybe an automation app that i can set that if wifi turns off it turns back on again
maybe i can do it with macrodroid ,i have not used it ia long time but think it may have the right options
do you hav eany other app suggestion that might work?
other is option is that i could use a UBS to ethernet but will it slow my connection since it is USB 2.0 ?
i have a USB to ethernet adapter but i'm not sure if it will even work and it is not gigabit
not sure if it could even make us of a gigabit USB ethernet because of USB being 2.0
gdroid666 said:
but HDMI is a wired connection
Click to expand...
Click to collapse
HDMI? The Silicon Dust HDHomeRuns are OTA (broadcast) and cable network tuners. They take OTA or cable channels and put them on a LAN. They have no HDMI connections.
The guy in question put a cable splitter on the cable from his OTA antenna so he could feed the HDHR network tuner and a Hauppague card at the same time. This results in a greater than 3dB (50%) signal reduction to each receiving device.
gdroid666 said:
wifi is wireless can
and does android really turn the wifi off if signal overload?
Click to expand...
Click to collapse
I did not suggest it does. Please read more carefully. I wrote "Signal overload can sometimes have odd effects on hardware and the software that drives it. " The implication being the hardware and/or software misbehaves.
Btw: That MiBox is unshielded. Being as it has internal antennas, it would have to be. That means that when you locate it right next to a transmitter you're bombarding the entire PC board with RF from that transmitter. (Coincidentally: You're doing your WiFi router's performance no favours by locating it directly next to another strong source of RF, either.)
All this is a Scientific Wild-Ass Guess based on nothing more than five decades of experience with a wide range of all kinds of hardware and, later, software, and seeing some of the most unexpected things happen. (See below for recent example.)
It's either that or the thing's simply broken.
How hard could it possibly be just to move the two apart by a few feet to test my hypothesis? N.B.: Signal strength decreases at the square of the distance (inverse square law). Thus, if you move it four feet away, as opposed to two, that second move doesn't halve the signal over the two foot move, but quarters it.
gdroid666 said:
i am thinking of just looking for a workaround
Click to expand...
Click to collapse
It's always better to fix it than patch it, if possible.
From the Department of Well, That Was Unexpected
I recently obtained a Silicon Dust HDHomeRun Connect Quatro network tuner. First thing I did was go to one of our traditionally most problematical channels to see how it'd perform. It was horrible. I assumed it was due to poor tuner performance. Boxed everything up to send it back. But I was persuaded to look more closely. I discovered it was actually performing better than my other tuners, and the problem appeared to be with just the one station. That station, it turned out, had a mere 60Hz carrier deviation. Insignificant. (0.000009%) They corrected it, anyway. Station reception cleaned right up. I would never have expected that in a million years.

Very Poor range after installing new battery

Hi guys,
I recently took apart my moto 360 2nd gen because the battery wasn't holding a charge, and after I installed the new battery, I noticed that the watch's bluetooth range was extremely short. I mean, I have to have it next to my phone (Galaxy S9) in order for it to get a bluetooth connection. I also tested its wifi range, and that has also taken a hit.
Any ideas?
Thanks.
Hi Liam. Same happened to me.
Did you find a solution? I suspect is may have something to do with Bluetooth/wifi antenna... I tried to look into internet for schematics or something like this, didn't find any.
The antenna is that sheet of metal paper around the case, it can get loose when putting it back.
Look for a full tutorial that includes the display and try again, if it was damaged you can try with a piece of foil to increase the surface. I have done this to notebook wifi antennas.

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