[Q] Where is the 3G antenna? - Nexus 7 Q&A, Help & Troubleshooting

My Nexus 7 3G signal is weaker than before after a RMA screen replacement.
Just curious where the 3G antenna is so maybe I can fix it by myself.
There seem to be 3 antennas on the back cover: Wifi, GPS and probably an NFC antenna(?).
So what about GSM?
I have searched around and found a similar thread but the photo is now dead:
http://forum.xda-developers.com/showthread.php?t=2020248

i am having the same issue. The screen cracked and I sent it to squaretrade for repair. Now the signal is weak and sporatic. Did you ever get this resolve? I think it may be EMI. They are not giving me an easy time becuse the connection still "works".

Related

[Q] USA t-mobile Connectivity Issues

I'm on T mobile in the usa and I'm using Nand Android, Hyper Droid CM7 2.01. I'am having issues with losing signal in areas I know I have coverage in but only shortly. It randomly goes in and out. I know this is an issue with TmoUSA. I was wondering if anyone in the usa uses a rom that does not have this issue or a solution? Thanks in advance for any help
I haven't noticed it in coredroid v1.6 but higher battery drain and more eye candy. Cymlx and the others were tested and had drops also.
Sent from my HTC HD2 using XDA Premium App
Yes, TMOUSA service drops in NYC area.
I'm glad you posted this question. I'm using Typhoon CM7 MADLDR (always the latest version) and notice a few day ago a radical drop in connectivity on TMOUSA in NYC Metro area. I spent the last couple of days revisiting all the reception points from SD ROM days (verifying APN, Phone setting in "WCDMA Preferred", searching network, etc) with no luck. Now with your post I think it may have been a system problem with TMobile all along.
It seems like the signal does not have as much strength as just a few days ago. I used to get full bars inside a building, but now no service. Out in the street I get random signal drops. Im not getting service in areas I know I used to get service before. I dont think it is ROM related, as it happened before I ugraded to 3.3.8.
Data is also very unreliable. In area's I had "H" or "3G", I'm only getting "E", or nothing.
Anyone hear of system issues with TMobile USA, northeast.
Edit- I've been using 2.15.50.14 Radio since the beginning of Android on my HD2.
I'm getting random drops, MAGDLR 1.13, Hyperdroid GBXv12. Southwest (AZ) I change to 2.15 radio, seems to have help slightly. I don't get complete dropouts of signal as often anymore, but seems unstable, going from 5bars to 2 bars. and constant switching between 3G and Edge.
Let me mention that my original HD2 was fine. My touch screen went out. After about a month to a month and a half of trying to figure it out (swapped, digitizer, didn't work, swapped digitizer+LCD, didn't work, swapped out motherboard, worked) I finally got it working again. I'm not sure if it's the different mother board that's causing my issues or if it just coincidentally coincided with some network issues TMo US's network has been having. (I did restore the phone to all my previous settings and radio ROMs)
I've had this problem for like two months or so. Its definitly my hd2 android cause I'll be around other people on T mobile and they may not have full bars but they with be pull 3g where I'm on E or nothing at all.
I figured out that my bad conectivity issues were caused by hardware problem. I say "were" because I fixed it.
It's a bad antenna connection. I realized I had a similar signal problems on my touch pro, caused by the main board contacts not touching the antenna pads on the back cover. I found pictures of a disassembled HD2 here on XDA and saw the same design. I removed the back of my HD2 and sure enough one of the contacts was bent low and not touching the antenna. I bent it back up, reassembled the HD2, and restored full bars!!
I think the contact was flattened when I dropped my phone.
Trust me, it's a very simple fix. I'll start a thread with instruction and and pictures if anyone wants it. There's an HD2 disassembly video and pictures available here: http://m.pocketnow.com/hardware-1/official-htc-hd2-disassembly-assembly-training-videos-leaked . You only need to take off the back 4 screws and pry off the back with a flat plastic stick .
I'm writing this now on my HD2 connected by T-Mobile whete previously I had no signal.
Sent from my HTC HD2 using XDA Premium App
nonpaq said:
I figured out that my bad conectivity issues were caused by hardware problem. I say "were" because I fixed it.
It's a bad antenna connection. I realized I had a similar signal problems on my touch pro, caused by the main board contacts not touching the antenna pads on the back cover. I found pictures of a disassembled HD2 here on XDA and saw the same design. I removed the back of my HD2 and sure enough one of the contacts was bent low and not touching the antenna. I bent it back up, reassembled the HD2, and restored full bars!!
I think the contact was flattened when I dropped my phone.
Trust me, it's a very simple fix. I'll start a thread with instruction and and pictures if anyone wants it. There's an HD2 disassembly video and pictures available here: http://m.pocketnow.com/hardware-1/official-htc-hd2-disassembly-assembly-training-videos-leaked . You only need to take off the back 4 screws and pry off the back with a flat plastic stick .
I'm writing this now on my HD2 connected by T-Mobile whete previously I had no signal.
Sent from my HTC HD2 using XDA Premium App
Click to expand...
Click to collapse
nonpaq,
You could have the answer I'm looking for! I've been posting all over the place looking for knowledgeable input on this exact issue (including here on XDA: http://forum.xda-developers.com/showpost.php?p=15423321&postcount=20).
As I mentioned in that post, after spending countless hours doing software-related troubleshooting to no avail, it occurred to me that there might be an internal problem with the phone. The problem is-- and quite unbelievably, considering all the other numerous resources for this device-- there isn't a whole lot of hard documentation on the HD2 cellular antenna circuitry. There's a bunch on the GPS lead, Bluetooth, WiFi, etc., but nothing on the main radio. The "official" HTC vids referenced above I've watched over a dozen times--nothing in there. All the HD2 tear-down threads with photos inconveniently ignore this part of the hardware. There's even 1 or 2 threads here on XDA in which I discovered someone erroneously labeled as the Antenna a part which is actually the Camera flash circuit.
I had pretty much exhausted everything and was about to give up, but your post could prove to be the light at the end of the tunnel.
So, before I relegate my phone to the recycling heap or sell it for parts, maybe you can journal the steps from your successful antenna "fix" (and some accompanying photos would truly be magnificent). BTW, I don't need fourteen pages of detail, just fleshing out the major points would do...
Not only would you be helping me immensely, but I've found quite a few others here on the boards with the same problem, therefore a lot of people would benefit from this guidance.
Many thanks in advance!
nonpaq said:
I figured out that my bad conectivity issues were caused by hardware problem. I say "were" because I fixed it.
It's a bad antenna connection. I realized I had a similar signal problems on my touch pro, caused by the main board contacts not touching the antenna pads on the back cover. I found pictures of a disassembled HD2 here on XDA and saw the same design. I removed the back of my HD2 and sure enough one of the contacts was bent low and not touching the antenna. I bent it back up, reassembled the HD2, and restored full bars!!
I think the contact was flattened when I dropped my phone.
Trust me, it's a very simple fix. I'll start a thread with instruction and and pictures if anyone wants it. There's an HD2 disassembly video and pictures available here: http://m.pocketnow.com/hardware-1/official-htc-hd2-disassembly-assembly-training-videos-leaked . You only need to take off the back 4 screws and pry off the back with a flat plastic stick .
I'm writing this now on my HD2 connected by T-Mobile whete previously I had no signal.
Sent from my HTC HD2 using XDA Premium App
Click to expand...
Click to collapse
I live in Dallas and I have been noticing the same thing for the last few months, thinking it was HyperDroid CM7 or maybe the radio 2.15 but I'm hoping this is what the issue for me is too. Will update and post tonight or over the weekend.
nonpaq
Thanks for all the input. I starting to think its a hardware issue like some have mention. I've change many roms, os and, radio to no avail. So that the only thing it could be, and I have dropped my phone a few times. nonpaq if you could please grace us with a simple tutorial, it would be greatly appreciated.
Bump nonpaq help please
I'm sorry I wasn't following this thread, so I didn't realize there was interest. I am on my phone now so I don't have access to photos to upload. Its actually a very easy fix on the HD2 because this phone is so easy to open. I will look for teardown photos to point out the antenna posts, and baring that I will just redo mine and take photos. Stay tuned.
Sent from my HTC HD2 using XDA Premium App
OK, I started a new thread to cover in more detail what I did for the hardware fix:
http://forum.xda-developers.com/showthread.php?p=16076515#post16076515

DeathGrip issue

Hi everyone,
Bought my SNS i9023 on 12 July 2011 (Indian version)
I'v been noticing a possible DeathGrip Issue with the phone since i bought it. The WiFi Signal & the Network Signal fade out quite a lot when i Hold the phone in my palm (the battery cover i.e. the the back side of my phone rests in my palm)
I wonder if I am the only one facing this issue or are others facing this issue as well.
I for one have never noticed this, and I've had mines for about 3 months now. Maybe you should try to get it exchanged.
Well I'm guessing your hands are covering the antennae of the phone (built into the mobo of the phone) every phone willlose signal is the bones in your hand (our any other solid thing) block the antennae. My 2¢ worth.
abhinavsg said:
Hi everyone,
Bought my SNS i9023 on 12 July 2011 (Indian version)
I'v been noticing a possible DeathGrip Issue with the phone since i bought it. The WiFi Signal & the Network Signal fade out quite a lot when i Hold the phone in my palm (the battery cover i.e. the the back side of my phone rests in my palm)
I wonder if I am the only one facing this issue or are others facing this issue as well.
Click to expand...
Click to collapse
Boom... Headshot! from my L96A1
xceleration said:
I for one have never noticed this, and I've had mines for about 3 months now. Maybe you should try to get it exchanged.
Click to expand...
Click to collapse
fowenati said:
Well I'm guessing your hands are covering the antennae of the phone (built into the mobo of the phone) every phone willlose signal is the bones in your hand (our any other solid thing) block the antennae. My 2¢ worth.
Boom... Headshot! from my L96A1
Click to expand...
Click to collapse
I m pretty sure my hands are blocking the signal coz of the way i hold the phone. would love to see a lot of other people responding to this thread
I have a similar problem but I think it might be a problem with the device so I'll need to send it back.
My connection drops a couple of times a day. I thought it may have been related to the case I use but I tried it without the case and I have the same problems.
How is your wireless signal? My Nexus S is much worse than my Nexus 1 so that's why I think (hope!) the phone is faulty. Hopefully it's not just a Samsung thing.
pugland said:
I have a similar problem but I think it might be a problem with the device so I'll need to send it back.
My connection drops a couple of times a day. I thought it may have been related to the case I use but I tried it without the case and I have the same problems.
How is your wireless signal? My Nexus S is much worse than my Nexus 1 so that's why I think (hope!) the phone is faulty. Hopefully it's not just a Samsung thing.
Click to expand...
Click to collapse
In my case the Connection to the MobileNetwork/WiFi does not drop by itself.
The connection becomes weak only if i hold the bottom half of the back of the phone in my plam. I mean if the bottom half of the back of the phone is covered by my palm (my palm & phone in total contact).
I dont have any problems if I am holding the phone in a way that the back of the phone is not covered by my palm.
When the phone is left alone, there is no fluctuation in the connections whatsoever.
abhinavsg said:
Hi everyone,
Bought my SNS i9023 on 12 July 2011 (Indian version)
I'v been noticing a possible DeathGrip Issue with the phone since i bought it. The WiFi Signal & the Network Signal fade out quite a lot when i Hold the phone in my palm (the battery cover i.e. the the back side of my phone rests in my palm)
I wonder if I am the only one facing this issue or are others facing this issue as well.
Click to expand...
Click to collapse
You'll have more luck here
http://www.iphoneforums.net/forum/iphone-general-discussion-12/

Nexus 7 wifi and 3g antenna

Where is the 3g antenna inside the nexus 7 (3g version) because when i'm using 3g i get 3 bars (signal strength) , but when i put my nexus in a case it drops to 1 bar. (its a case where i can use my nexus 7 while inside the case , it doesn't cover the screen).
i'm wondering if i'm blocking the 3g antenna/signal with the case?
my wifi signal is 4 bars and it stays at 4 bars even when i use it inside the case , so wifi is not being affected , just 3g.
adz7777 said:
Where is the 3g antenna inside the nexus 7 (3g version) because when i'm using 3g i get 3 bars (signal strength) , but when i put my nexus in a case it drops to 1 bar. (its a case where i can use my nexus 7 while inside the case , it doesn't cover the screen).
i'm wondering if i'm blocking the 3g antenna/signal with the case?
my wifi signal is 4 bars and it stays at 4 bars even when i use it inside the case , so wifi is not being affected , just 3g.
Click to expand...
Click to collapse
The case shouldn't be blocking the 3g signal unless the case is metalic or (possibly) the case has an overly powerful magnet to shut off the screen when not in use and that is affecting the 3g when its on. I could see that causing an affect potentially.
As far as I am aware, the aerial is in the back of the case and from a very unscientific test of "putting my hand over bits of my Nexus" it appears that it is mostly affected by anything blocking the top of the Nexus (near the camera).
I've got mine in a leather roocase and have no difference between in the case and out. Position of the Nexus relative to the horizontal makes a much greater difference than anything else I've found.
its not metallic , but it does have a magnet on it to close the case . nice to know its up the top where the camera is , thanks for letting me know , i will keep a eye on it and maybe buy a new case!
adz7777 said:
its not metallic , but it does have a magnet on it to close the case . nice to know its up the top where the camera is , thanks for letting me know , i will keep a eye on it and maybe buy a new case!
Click to expand...
Click to collapse
Here is an image of the inside of the case,
The 3G Radio Antenna is the Horizontal Bar under black tape in the top 1/3 with the 2 connectors top and bottom centre of it
GPS Unit above it, Wifi To Side of Case.
https://dl.dropbox.com/u/33717226/NEXUS0.jpg
I cant see the 3g antenna on that pic , is it in the top left where it says BOT from looking at the pic? or is that totally wrong!?

Poor Signal after Replacing Digitizer

Originally I had great service 3-4 bars continually, I dropped my S4, got a small crack it, tried to replace just the glass screen and I mistakingly hit the digitizer and had to replace it. I replaced the digitizer and have the phone on, however I am barely able to make any calls now. In the last 6 hours I was able to make 1 successful call. Even wigle wifi where I would usually see ATT at around -103db is showing -110db or not showing the ATT signal at all. Even going down to where I know normally I get -59 db to ATT I am getting no signal or in and out signal.
I have tried to swap out the internal antennas.
What is suggested? I have obviously turned the phone off and on multiple times during the last 6 hours, so something more informative than the basic, please....
Where did you have the digitizer replaced?
Where did I get it from?
I replaced it myself. It was a very simple replacement, but I do not see what role the digitizer would play in the signal?
Just confirmed even being less than 100ft away from a tower. I have no bars, previously I had 5 bars in the same area. It fails to register on ATT as well.... seems something is funky with the radio or antenna. I have swapped out 3 antennas of different length, all giving the same results.
It must be the schematic of this board. It is for sprint, not ATT. Although the PCB has the radio on it, it seems like the bottom of the attachment has 2 separate antenna connectors where as my PCB has one.
Odd. Very Odd! I am going to grab a I-377 one AT&T logo and see if that helps. It is something with antennas because even when I remove the antenna the signal is identical.
denali1231234 said:
Just confirmed even being less than 100ft away from a tower. I have no bars, previously I had 5 bars in the same area. It fails to register on ATT as well.... seems something is funky with the radio or antenna. I have swapped out 3 antennas of different length, all giving the same results.
It must be the schematic of this board. It is for sprint, not ATT. Although the PCB has the radio on it, it seems like the bottom of the attachment has 2 separate antenna connectors where as my PCB has one.
Odd. Very Odd! I am going to grab a I-377 one AT&T logo and see if that helps. It is something with antennas because even when I remove the antenna the signal is identical.
Click to expand...
Click to collapse
You need an att one that's why.
Sent from my GT-I9505 using Tapatalk 2
Same problem with the GSM version of the Nexus 7. You can use the bezel from the 32 GB WiFi model, but it won't have these special little contacts needed for the radio to work property. You need the AT&T parts. Always get parts specifically for your model number.
Sent from my SPH-D710 using xda premium

[Q] Shocking WiFi..

Hello, my galaxy s4 i9505 has really bad wifi reception, as in if im o the other side of the room to the router its on 1 bar/dropping in and out.. ive taken it apart and pulled the pins up and cleaned the antenna, is there a fix or this? (im on 4.4)
calum96 said:
Hello, my galaxy s4 i9505 has really bad wifi reception, as in if im o the other side of the room to the router its on 1 bar/dropping in and out.. ive taken it apart and pulled the pins up and cleaned the antenna, is there a fix or this? (im on 4.4)
Click to expand...
Click to collapse
move your router to the center of your home......... S4 has good reception your router needs better antennas or moved.
I can go on all three floors of my flat here in Hong Kong its made of rock not wood like most homes in the west. So i think its your router position and you need stronger antennas on the router.
Use WiFi analyser app to see if there is overcrowding on the channel you are using. If there is then change channel.
If it's not that, you can flash a new baseband.

Categories

Resources