Develop Bugs

[Q] EVO Armband? Not a pouch on a band

I am looking for a Armband for my EVO. I would like to find one that allows me to view the screen while it is in the band. I got one from Ebay that came from Hong Kong that says it will work for the phone but it is tight (so tight is causes signal loss) on the phone and only can view 2/3 of screen. If anyone out there has gotten one or seen one please let me know.

detyrone2k said:
I am looking for a Armband for my EVO. I would like to find one that allows me to view the screen while it is in the band. I got one from Ebay that came from Hong Kong that says it will work for the phone but it is tight (so tight is causes signal loss) on the phone and only can view 2/3 of screen. If anyone out there has gotten one or seen one please let me know.
Click to expand...
Click to collapse
I am not sure how being tight would cause signal loss unless your seeing the signal loss while it is strapped to you arm, in which case it is your arm, not the case.
As for your question, have not seen any yet, my wife sews like crazy so when I need something like that I just ask her for it lol.

flyingwolf said:
I am not sure how being tight would cause signal loss unless your seeing the signal loss while it is strapped to you arm, in which case it is your arm, not the case.
As for your question, have not seen any yet, my wife sews like crazy so when I need something like that I just ask her for it lol.
Click to expand...
Click to collapse
Yeah, it cause signal loss in the wireless network and the GPS. even if it is not on my arm. A friend says it being tight would cause a pinch on the chip. To much pressure on the screen it what he says. He is a electronic engineer too. So i would believe him.

Your friend is wrong. The chip for wifi and cell is on the back of the board away from the screen. At most it may be signal attenuation due to a material in the case.
To show I am not talking out my ass here.
http://www.ifixit.com/Teardown/HTC-Evo-4G-Teardown/2979/1
As you can see the chips are on the back of the board.

As someone with seven years of RF experience I just have to say, this is the most absurd thing I have ever read online.
Sent from my PC36100 using XDA App

phobos512 said:
As someone with seven years of RF experience I just have to say, this is the most absurd thing I have ever read online.
Sent from my PC36100 using XDA App
Click to expand...
Click to collapse
Which part?

the reception thing sounds crazy
i use an arm band for an ipod touch that is a "stretchy/spongy" material and i can still see the phone and change songs through the thick plastic coating on the front. I sweat ALOT too and still never had water damage after 45 min+ runs
its very similar to this one but an older model i think(had it for years for my 1st gen zune). Just stretch it out lol
http://www.griffintechnology.com/products/aerosport-iphone
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SGS2 and external antenna?

Hi to all,
Does anyone know if there is a chance to connect the sgs2 to an external gsm antenna? I would like to use it within my BMW and I wonder if I can build a custom snap-in.
Thank for your suggestions,
Spampunk
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Does anybody know what is that little golden connector, above the battery, left from the SIM?
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I suspect it to be some kind of antenna connector...
Spampunk said:
Hi to all,
Does anyone know if there is a chance to connect the sgs2 to an external gsm antenna? I would like to use it within my BMW and I wonder if I can build a custom snap-in.
Click to expand...
Click to collapse

Reminds me to the plug of my GPS antenna. Maybe it is for GMS? Does anyone know who at Samsung could help with that?
Sent from my GT-I9100 using XDA App
Krampfadern: Ursache, Diagnose und Behandlung - Varikosis
Tipps gegen schwere und müde Beine

this connector was discussed already, i think they said it was for an external GPS antenna.

this connector was also available for sgsI and I know there was a in-car holder for SGSI in which you should remove the back cover and place the mobile into the holder. So that the external antenna connects to the golden connecter for a more precise location service.
I'd seen it in a yt video when I had GPS issues on my sgsI on froyo while I was surfing through a solution but maybe after watching tens of videos so I couldn't find it now after a brief search

I did a quick check in the service manual, and it seems like this is related to GSM/3G and not GPS, but I'm not 100% sure (this connector is called ANT100 in the service manual).

It's DEFINITELY for the GSM/3G external antenna.
That said, DO NOT connect an external antenna there. It WILL damage the phone and the internal antenna will stop working. You can maybe ressurect it with a little soldering, but it's not worth it.
There is another thread where it's documented.

Do you have a link to the threat?

http://forum.xda-developers.com/showthread.php?p=18594705

Broken connector!

Hi guys, i recently got an htc one x which had signal problem, going into detail, i found that one of the connectors of the antenna cable is completely wiped off (soldered out) from the motherboard. the cable itself is fine
Is there anything that can be done?
I mean can i connect the antenna cable (core wire) to somewhere else to get it working,
PS. Currently, i only get signal at a few places, that too outside in open areas where signal strength is high.
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Thanx in advance.

If you can try to solder the cable directly to the motherboard or try to solder the connector!

arun6106 said:
Hi guys, i recently got an htc one x which had signal problem, going into detail, i found that one of the connectors of the antenna cable is completely wiped off (soldered out) from the motherboard. the cable itself is fine
Is there anything that can be done?
I mean can i connect the antenna cable (core wire) to somewhere else to get it working,
PS. Currently, i only get signal at a few places, that too outside in open areas where signal strength is high.
Thanx in advance.
Click to expand...
Click to collapse
Hey,
sorry to hear that. I have dealt with similar connectors in the past (on a laptop wifi card - results were 30% less signal) and in my experience its better to buy the connector and soldier it to the board if you can.
Good luck with the repair

Thanks
peshko69 said:
Hey,
sorry to hear that. I have dealt with similar connectors in the past (on a laptop wifi card - results were 30% less signal) and in my experience its better to buy the connector and soldier it to the board if you can.
Good luck with the repair
Click to expand...
Click to collapse
@Thant Thanks for the reply, but where to solder it, nothing is left there, i'll post the pics of my phone's board to make it more clear.
@peshko69
Thanks brother, i'll let this in the hands of experts, will hand it over to a good engineer
I was just worried coz one repair person said nothing can't be done now, as connector isn't there.

arun6106 said:
@Thant Thanks for the reply, but where to solder it, nothing is left there, i'll post the pics of my phone's board to make it more clear.
@peshko69
Thanks brother, i'll let this in the hands of experts, will hand it over to a good engineer
I was just worried coz one repair person said nothing can't be done now, as connector isn't there.
Click to expand...
Click to collapse
Good idea

Shown the phone to 2-3 repair persons and they all said nothing can be done.

Help with LG G3 Homemade heat sink

After seeing this for the Optimus 4X (http://forum.xda-developers.com/optimus-4x-hd/general/guide-homemade-heatsink-easy-to-make-t2971385), I decided to try one for the G3.
I covered most of the back part (except the sd slots, camera, etc.), and although the heat still felt similar (when touching the power/vol. buttons), the games didn't lag/stutter as much (I'm assuming it's cause of thermal throttling).
However, one problem I'm experiencing is the GPS problem. The foil made it impossible to get a GPS lock (and I had to rip the foil out while I was driving and lost, thus no pics ). Furthermore, I tried Googling, but couldn't find information about where the GPS module is located on our phone.
Can someone help with:
(a) Trying it out and confirming that the heat sink really works and isn't just a placebo effect on my side,
(b) Locating the GPS module so we can hopefully work around it?

In regards to b, the GPS is on-die with the CPU, as seen here (In the most obvious place in my opinion, the site of the manufacturer xD)
https://www.qualcomm.com/products/snapdragon/processors/801
Qualcomm decided to put everything into one package so it's not spread throughout the phone and decreases overall size, so yes the GPS is with the CPU and almost everything else
If you watch any teardown video, you will see that the CPU/System die is exactly in the middle of the phone, right behind the lock/unlock and volume rocker. So keeping a nice square cut-out of the aluminum foil should let all the signals pass through, but then you won't have the heat being transferred from the CPU, only from around it so the CPU might still heat up :/
TL;DR: Not really much you can do because the GPS is on the CPU unfortunately :/

That graphic (from the Qualcomm site) is more an infographic than an actual layout of the cpu. Aside from that, it's only the GPS logic circuitry that's on the chip, not the GPS antenna. That graphic shows a camera on chip, too, but we all know the actual camera isn't located on the chip.
What matters for the OP is where the GPS antenna is located. That's shown in the image below, from the Anandtech web site: http://www.anandtech.com/show/8169/the-lg-g3-review/9
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Where is the lte antennas located?

I'm planning on installing magnetic plate under the back plate (circled in red) for my car mount and I was wondering where the antennas were for LTE. I didn't want the plates to interfere

According to the full ifixit teardown they are one of the orangey-gold areas at the top, on the inside of the rear case.
https://d3nevzfk7ii3be.cloudfront.net/igi/LKmLDjCoZLJLj2Jk.huge

Hi
Its a bit more complex than that unfortunately. The transmit cell antennas are at the bottom, this places them away from the ear. Receive antenna for cell calls are at the top along with Bluetooth, WiFi and GPS.
Regards
Phil

PhoenixTank said:
According to the full ifixit teardown they are one of the orangey-gold areas at the top, on the inside of the rear case.
https://d3nevzfk7ii3be.cloudfront.net/igi/LKmLDjCoZLJLj2Jk.huge
Click to expand...
Click to collapse
It says "the Wi-Fi, MIMO, and GPS antennae still reside on the rear case, along with the NFC antenna which formerly lived on its own control board. Unfortunately, those super convenient labels from the Nexus 5 have transformed into cryptic codes."
so the antennas are not near the area right under the fingerprint sensor right?
PhilipL said:
Hi
Its a bit more complex than that unfortunately. The transmit cell antennas are at the bottom, this places them away from the ear. Receive antenna for cell calls are at the top along with Bluetooth, WiFi and GPS.
Regards
Phil
Click to expand...
Click to collapse
do you think sticking a metal plate under the fingerprint sensor on top of the battery is a great idea or do you think it'll affect with my lte and wifi? I don't care about NFC, I just care about my signal

btort1 said:
...do you think sticking a metal plate under the fingerprint sensor on top of the battery is a great idea or do you think it'll affect with my lte and wifi? I don't care about NFC, I just care about my signal
Click to expand...
Click to collapse
Why not get an app like SignalCheck to monitor your signal strength while holding the metal piece in the spot you're considering?

Hi. Can someone tell, which antenna this leg on the motherboard goes to? (Highlighted with a red arrow on the pic)
Or point me at the data sheet for 5X. Thank you in advance!
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