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External Antenna Socket - WARNING

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By kingqueen, Member on 22nd September 2011, 10:36 PM
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I have been attempting to use the antenna socket located under the battery cover on my S2. Sometimes I go to a very remote location for a week where I can only get reception via a amplified Yagi pointing at the nearest transmitter (Orange only as well, no other networks for miles.) I currently use a P1i for this as being dated it has an antenna socket.

I wanted to do the same with the S2. I was very excited to spot the antenna socket under the battery cover. Much research online doesn't really give much information about it; neither did a phone call to Samsung (who were unhelpful.) Some online shops in Australia sell a constructed link for it but nobody here in the UK does, as far as I can tell. So I was looking at creating my own pigtail lead.

Having difficulty finding what precisely the socket is, (it isn't an MCCX I can guarantee, others report it isn't an MCX) I took a thin wire and pushed it into the centre to see if I could bodge a connection together.

Big mistake! The external antenna works - but now the internal connector doesn't. Whenever an external antenna is connected it disconnects the internal one. It turns out that if you use the wrong side wire, it appears to force apart two contacts within the socket (best I can tell with my loupe) and the internal antenna never works again.

I suspect the solution for Galaxy S which sometimes had a spontaneous similar issue - removing the antenna socket and shorting the contacts - would work, but it's not at all simple to do especially given the infrastructure on the other side of the PCB.

People think that this socket is only intended as a test point for use by Samsung before shipping the phone. I would strongly suggest NOT MESSING WITH IT or using it - and if you do, to buy (import if necessary) the specially made cable. Otherwise you may suffer my fate and have no internal antenna connection any more.

Beware...
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23rd September 2011, 01:26 AM |#2  
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Thanks for the info.
I'd wondered about that socket...

Sent from my GT-I9000 using Tapatalk
23rd September 2011, 09:12 AM |#3  
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Quote:
Originally Posted by kingqueen

I have been attempting to use the antenna socket located under the battery cover on my S2. Sometimes I go to a very remote location for a week where I can only get reception via a amplified Yagi pointing at the nearest transmitter (Orange only as well, no other networks for miles.) I currently use a P1i for this as being dated it has an antenna socket.

I wanted to do the same with the S2. I was very excited to spot the antenna socket under the battery cover. Much research online doesn't really give much information about it; neither did a phone call to Samsung (who were unhelpful.) Some online shops in Australia sell a constructed link for it but nobody here in the UK does, as far as I can tell. So I was looking at creating my own pigtail lead.

Having difficulty finding what precisely the socket is, (it isn't an MCCX I can guarantee, others report it isn't an MCX) I took a thin wire and pushed it into the centre to see if I could bodge a connection together.

Big mistake! The external antenna works - but now the internal connector doesn't. Whenever an external antenna is connected it disconnects the internal one. It turns out that if you use the wrong side wire, it appears to force apart two contacts within the socket (best I can tell with my loupe) and the internal antenna never works again.

I suspect the solution for Galaxy S which sometimes had a spontaneous similar issue - removing the antenna socket and shorting the contacts - would work, but it's not at all simple to do especially given the infrastructure on the other side of the PCB.

People think that this socket is only intended as a test point for use by Samsung before shipping the phone. I would strongly suggest NOT MESSING WITH IT or using it - and if you do, to buy (import if necessary) the specially made cable. Otherwise you may suffer my fate and have no internal antenna connection any more.

Beware...

Maybe pushing the same bit of wire back in would again bridge the contacts and give you your internal aerial back? Snip it off just above the socket?
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23rd September 2011, 01:41 PM |#4  
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Quote:
Originally Posted by silk_nz

Maybe pushing the same bit of wire back in would again bridge the contacts and give you your internal aerial back? Snip it off just above the socket?

Thanks for the excellent helpful suggestion, regrettably it doesn't work though. The little bit of wire itself works as an antenna but it doesn't reconnect the internal antenna. I think this is by design: pushing a pin in should disconnect the internal and connect the external, sadly in my case whilst it did do this the wrong diameter wire stopped it going the other way!

Happily good news: I've negotiated a warranty replacement, doorstep swap for a new one. Thank you O2.

Additional info for anybody thinking of trying to get a connector for this socket: having received an MCX connector in the post today, I can confirm that both MCX and MCCX connectors are definitely not compatible with the phone's external aerial socket and can't be bodged to work on it either.

Elsewhere forum contributors state a Samsung tech told them it is an "MPX" connector. The only MPX connector I can find on the Web is something entirely different, not for use with mobile phones.

What a mystery

Thanks once again
23rd September 2011, 01:44 PM |#5  
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Guys, do not touch that Socket!

I did the same and my s2 is now at the servicepoint!
23rd September 2011, 02:14 PM |#6  
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Quote:
Originally Posted by n-zocker

Guys, do not touch that Socket!

I did the same and my s2 is now at the servicepoint!

sorry to hear you've had the same fate as me!

Did you use the official patch lead e.g. http://www.cellink.com.au/productdet...05N&byp=2&qf=1 or try to bodge one like me? I've ordered an official one but think I'm too scared to use it, having broken one s2 already!

Further info, it's an MS147 connector.
23rd September 2011, 04:54 PM |#7  
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being that its under the battery cover, with no opening to the outside casing I would assume this to be a Manufacturer port only. and therefore shouldn't be used, nor played with.

I appreciate your efforts and troubles but sometimes you should leave these things alone, is there not a solution that doesn't require a connection?
23rd September 2011, 05:32 PM |#8  
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Quote:
Originally Posted by kingqueen

sorry to hear you've had the same fate as me!

Did you use the official patch lead e.g. http://www.cellink.com.au/productdet...05N&byp=2&qf=1 or try to bodge one like me? I've ordered an official one but think I'm too scared to use it, having broken one s2 already!

Further info, it's an MS147 connector.

nope i broke mine with that "wire method" ^^

i will touch that port never again
23rd September 2011, 06:53 PM |#9  
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Quote:
Originally Posted by diablous

being that its under the battery cover, with no opening to the outside casing I would assume this to be a Manufacturer port only. and therefore shouldn't be used, nor played with.

What, like the microSD port, and the SIM slot?
23rd September 2011, 08:34 PM |#10  
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Quote:
Originally Posted by diablous

I appreciate your efforts and troubles but sometimes you should leave these things alone, is there not a solution that doesn't require a connection?

Not really! Passive antenna couplers don't work. I'll have to go back to my p1i with its antenna socket and Sony Ericsson antenna lead, obviously designed to be used. Old skool! Even then I can only get signal on one network, amplified using a vehicle pcs amplifier and using a directional Yagi...

Sent from my HTC Desire using xda premium

^^^ cos my SGS2 is dead and not swapped out yet :(
17th October 2011, 05:06 AM |#11  
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Quote:
Originally Posted by kingqueen

sorry to hear you've had the same fate as me!

Did you use the official patch lead e.g. (Link deleted) or try to bodge one like me? I've ordered an official one but think I'm too scared to use it, having broken one s2 already!

Further info, it's an MS147 connector.

I did use the Cellink connector and it killed my internal antenna.

I asked about this and was told they checked with Samsung and the port is ok to use. Sounds like a design problem but will wait and see what the service centre says.
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