Incomplete Internal Antenna

[Timeshell]

I am entering this as a new post as I had a very hard time find this one and I think it's important. Also, I haven't been able to fix a replacement yet... :(

This is a continuation of this thread.
http://forum.xda-developers.com/showthread.php?t=250565&page=2

Quote:
Originally Posted by bogusiano
Hi, well let me update you and tell you what I have found. I changed from Carrier and everything is working fine now, but yesterday I decided to open my Jasjar to see if there is any chance of improving the original antenna, I opened my device with the HTC Service Manual (There is a copy on the FTP). To my surprise I discovered that the Universal has 3 atennas for the GSM/UMTS Service (I don't know what is the purpose of each one), and my Jasjar is missing one of them!!!! :shock: And a conductive tape (are they really important???)

I couldn't believe it because my Jasjar was returned to warranty at Dubai, they changed the motherboard but they didn't realized that it was missing one antenna! Are they blind????? Maybe they are opening devices very cool with their sunglasses on 8) !!!!!!! :evil:

So I decided to make an antenna for it with the antenna of a Motorola phone I used, and my Jasjar worked perfectly with my past carrier (I haven't been able to cancel the contract so I am paying 2 contracts thanks to i-mate :evil: )

So my question is do anyone of you knows the purpose of each antenna?

What should I do, should I contact i-mate and tell them they are blind and that I will sew them because of all I have been through?

Thank you very much and I hope this time you will help me guys!

Here are the pictures:


DUDE!!! YOU ARE THE MAN!! People have been complaining about me not receiving calls, so I finally started to investigate and after a long search stumbled across this post!! I opened mine up and bingo, I am missing this antenna as well.

I'm going to try to fabricate a replacement and see if things go better. Someone ought to pin this post or put it somewhere obvious as this is a big find!!

Thanks again dude! :p

UPDATE:

OK... I've been trying to fabricate a new antenna using some sheet aluminum, but it is too flimsy to keep the contact. Also bloody hard to cut to the right size (took me four attempts) and finally succeeded size-wise after measuring with a micrometer.

Can anyone please suggest an alternative? Is there a place to get a replacement antenna with all 3 in place?

So, what do you all think guys?

[Timeshell]

I managed to make a more sturdy antenna using pop can metal. I ensured that the contacts were actually conductive and placed it in. However, I don't see a noticeable improvement in signal strength. It may just be an issue with the contacts though.

Could it be that the SPV M5000 was intentionally designed to omit one of the antenna's to discourage use on another provider's service??

May I suggest that the 3 antenna's are for EGSM (900), DCS1800 and PCS1900? Presumably, that would also explain the different sizes in the plates...I'd say the largest one is 900, the second largest is 1800 and the smallest is 1900.

The GSM mode sets EGSM and DCS1800 which are the modes I used. The second largest antenna is the one that appears to be missing. I'm going to try service on PCS1900, but I don't think my carrier uses it.

Still looking for an OEM antenna if anyone can direct me there.

UPDATE:
I have compared my mainboard to the picture in the service manual, and not only am I missing the antenna for DCS1800, but it appears that even the mainboard may be MISSING components to support the DCS1800 antenna! Can anyone comment on this? Where the picture in the service manual has little black dots which I presume are components, mine only has the gold connectors. This seems bad as this could basically mean that Orange phones are crippled to PCS1900 and EGSM(900).

Can anyone who is qualified please comment on this??

[Timeshell]

Ok, after getting more info on the provider, probing around in the phone and playing with settings, it ACTUALLY seems for MY case that I WAS using PCS1900. My provider uses 850 and 1900. I had always selected the setting for EGSM & DCS1800 and presumed that was the frequency actually being used. However, the EGSM for Orange is 900, not 850. SO, that must mean that despite the settings I had manually set, it must have been automagically switching to PCS1900 anyway.

That being said, I presume I must be getting poor signal in certain places because my phone can't roam to the 850 frequency when it loses the 1900 one and therefore just drops signal.

Now I'm on a hunt for a 850/1800/1900 OR 850/900/1800/1900 Universal. :(

Hope this post helps someone someday. It's been one heck of an adventure for me.