yashsingh1/xdaforums huggingface dataset:
[Galaxy S III Q&A, Help & Troubleshooting] jazua:
The problem is my battey that time was around 90+ so that cant be the reason it drop suddenly that it reach to empty batt.

Btw, whats a charger lead?

I don't have a USB jig. I guess i need to look one and try it.
[Galaxy S III Q&A, Help & Troubleshooting] iounas:
I used WifiTrak on iphone, basically it scans all wifi-s and connects to open wifis and pings google to verify internet access and it works nicely.

Is there something like that for S3? Or some alternarive
[Galaxy S III Q&A, Help & Troubleshooting] iounas:
*cant edit title. Enter by mistake
[Galaxy S II Q&A, Help & Troubleshooting] duguet:
Hi,

I had a problem with the micro-usb port/charger in my galaxy s2. It was what others have already described (constantly charging/not charging, voltage too high messages, etc). So I decided to buy a spare part for the charger, and replace it .

The first time I turned it on, The charger problem was completely solved, but I noticed the signal was gone. I realized I forgot to connect the antenna. So I opened it again and connected it. The antenna is a HF cable which connects to one end to the main board, and to the other end to the spare part I bought.

After reconnecting the cable I saw an improvement, but the signal is still much worse that before replacing it for the first time.

I bought the part here (German language):

[] IShallNotPostLinksAsANewUset []

Could it be this replacement part?? Might be a capacity adjustment problem? I don't know how are usuallry phone antennas designed. I don't know either if this part plays an important role for the antenna (it is anyway connected to the cable).

What can it be? What would you do to recover antenna sensitivity? (I do not have the broken part, it is already gone :( )

Best regards
[Galaxy S II Q&A, Help & Troubleshooting] Geronymous:
Hi, after having had the same problems with charging, I also changed the micro-USB flex circuit/cable. I bought it in the UK from e-cell (on ebay) ... and same as you, I am not able to get 3G anymore, only G! Charging is solved, 3G is gone! :(

I do have the old part still ... will put it back on and see what happens.

UPDATE:

OK, I put the original part back in ... and 3G/H was immediately back. I can also see that the network strength is the same as with the replacement part (so it doesn't seem to be a defective antenna cable or so), but now it picks up UMTS and HSPA+, while the replacement part only caught GPRS. So what this means is that the replacement part is not the same as the original ... probably the same problem you have.

At the same time there was no miracle and the original part is still no charging unfortunately ...

I had ordered 2 other replacement parts in HongKong which should arrive in a couple of weeks ... will try those when they arrive, and hopefully at least one of them will solve the charging AND the 3G issue!

UPDATE 2:

While driving around with the phone with the replacement part, sometimes I do get E/3G/H+ signals, so it appears that the part is able to handle these ... but maybe only when the signal is very strong? Or maybe there are different types of E/3G/H+ signals?
[Galaxy S II Q&A, Help & Troubleshooting] dmeireles:
Hi,

Experiencing the exact same behaviour, the signal is really bad (never above 3 bars). I'm going to open the phone tomorrow to make sure I left the antenna cable properly connected, but judging from what I'm seeing here, I believe the issue is with the small circuit with the USB port. I bought my part from e-cell as well....
[Galaxy S II Q&A, Help & Troubleshooting] duguet:
Thank you very much for your answers guys. Now I know that my problem is not unusual. however in my case the 2g signal receptiony is also to degradated. Please keep us posted when you get the spare parts from Hong Kong. If they work I will also order 1 myself.
[Galaxy S II Q&A, Help & Troubleshooting] Geronymous:
OK, good news ... today I got my second part, and this one seems to work just fine! 3G and H+ are back! And of course it charges.

As I ordered 2 different parts at the same time from HongKong, I am not 100% sure which one I got, but I am quite confident it is the one from mingxing200808. The item I bought is sold out now, but he relisted it (at higher price: 6.90 USD vs 3.90 USD that I paid, still worth it though). Note that the picture posted is not the same as the part shipped (which was newer, at least in my case). Also note that you need to reuse the rubber cover of the microphone (e-cell included that rubber piece). There is also no adhesive on the mingxing part, but as far as I can see you don't need that either.

Good luck!
[Galaxy S II Q&A, Help & Troubleshooting] TomDewhurst111:
Hi Guys, I have had this problem also after replacing the usb board, it has been a nightmare thinking that other parts may have been water damaged I replaced the loudspeaker and inner chassis which both have antenna components. After reading your post I ordered a used part from gaproducts on ebay at £3.85 and my phone is now perfect. By the way the defective one was from china via ebay and supposed to be genuine. Wish I had seen this post a month ago it would have saved me so much hassle, but hopefully will help others.
[Galaxy S II Q&A, Help & Troubleshooting] Blue Angel o.O:
This is strange, i have the same problem after changing the Flex Cable + Charging port. I bought it from ebay (user name yake-gandi3388) so be careful. I requested a refund or replacement but not sure what the answer will be. The phone never connects now to HSDPA (H), it always stays on EDGE (E). On top of that the signal is somehow weaker than before, not significantly, but I can notice it

I thought that the Flex Cable+Charging Port are not linked to Antenna performance in any way :( Can someone more experienced explain a bit?

Also, anyone tested an aftermarket flex cable+charging port that is working ok, including the antenna performance and full 3G connection?

Thanks!!!
[Galaxy S II Q&A, Help & Troubleshooting] theunderling:
Ive followed about 10 threads about changing usb boards.About 1 person was happy,and the other 9 got other problems.

When they put their "faulty" one back in,the "new" problems vanished.

Most were replacing the board because of usb problem.

I thought they were buying faulty replacements.For all I know someone at Samsung could be "recycling" faulty parts..
[Galaxy S II Q&A, Help & Troubleshooting] da_17:
I'm experiencing the exact same problems!! What's weird is that with other carriers (that work in different frequencies) my phone works just fine... I'll try buying another flex cable and will tell you the results.
[Galaxy S II Q&A, Help & Troubleshooting] Blue Angel o.O:
Strange... I will try to check with other providers as well. On my side, I have re-contacted the Ebay member and he offered me an additional Flex Cable with no extra charge. Nice commercial initiative, however I am afraid that the next one will have the same issues :eek: Will keep you updated once it arrives.
[Galaxy S II Q&A, Help & Troubleshooting] dave106:
Got this as well. I changed my USB board after it developed charging problems. The first one gave me a flashing battery icon & one of the screw holes didn't line up also. The next one fitted fine but I'm sure my signal is weaker. Compared to my friends S1 on the same network. He gets a stronger signal than me, stood in the same place. Replaced my loud speaker/antenna as I've also replaced the back chassis and think prising the speaker out might of damaged it. Think I'll try another USB board to see if it improves :S the 2nd board had the same Rev. number on it but looked slightly different to the original. (Sadly dont have the original to put back in to test)

Sent from my GT-I9100
[Galaxy S II Q&A, Help & Troubleshooting] Pitch3:
I am signed up for a solution to this problem.

I had charging issues with the old port and replaced the board. The new board only allowed for an intermittent 1 signal bar. I put the original faulty board back in and had full signal immediately.

I ordered a second board and have the same issue. No/1 signal bar. Cannot make calls, it tells me "mobile network not available." I can connect to wi-fi with no issues though.

Unless a fix is found I am considering taking one of the new boards and my old board into a service shop and having the usb ports swapped.

Galaxy S2 SGH-i777 (AT&T)
[Galaxy S II Q&A, Help & Troubleshooting] Pitch3:
I received a 3rd charging port board today, this one works some, but not as good as original. I'll post the number's printed on the board with there results in the phone.

Original Board: GT-i9100 REV2.2

R.B83 35

Original board worked great until it started having issues with charging/high voltage.

Replacement Board 1: GT-i9100 REV2.3

R.C42 10

This board would charge the phone and connect it to the computer, but would not connect to a network and would give no signal or a temporary 1 bar signal.

Replacement Board 2: R.B54

GT-i9100 REV2.2

This board would charge the phone and connect it to the computer, but would not connect to a network and would give no signal or a temporary 1 bar signal.

Replacement Board 3: GT-i9100 REV2.2

R.B83 36

This board both charges and connects the phone to the computer and it allows for a network signal. The network signal is not quite as good as my stock, but I think it will do.

I do not know what the board numbers mean, but I would guess the REV2.3 is an updated version of the REV 2.2. I think the compatability issue may come in the R._ numbers as Replacement Board 3 is the only one that works and is the closest R._ match. Maybe someone with far more expertise can shed some light on it, but this is my experience.
[Galaxy S II Q&A, Help & Troubleshooting] duguet:
viva! the party from Hong Kong worked for me. For everyone which needs this part search for

the vendor on google. I am using my phone for the 2100Mhz 3 g band.

Cheers!
[Galaxy S II Q&A, Help & Troubleshooting] theunderling:
Good.

So whats the vendors name....or is it classified.
[Galaxy S II Q&A, Help & Troubleshooting] krayndr:
I changed my usb port as well due to not charging/over voltage, ordered it from hongkong via ebay.

Been using the new one for over 6 months now and i would be lying if i said i had any 3G problems. And someone already asked this in this thread but no one has answered it. How are usb charging port and 3G signal linked??
[Galaxy S II Q&A, Help & Troubleshooting] dave106:
The USB board has the contacts to connect to the antenna in the back of the chassis. So replacing it with a sub standard part is affecting signals

Sent from my GT-I9100
[Galaxy S II Q&A, Help & Troubleshooting] Blue Angel o.O:
Please let us know the vendor name on Ebay. As mentioned in my previous post, the vendor (user name yake-gandi3388) agreed to change my replacement with no extra charges. I installed the new piece...the signal is a bit better than previous one...but still lower than the original.

Can anyone advise a vendor that sells replacement part Flex Cable with a strong signal?
[Galaxy S II Q&A, Help & Troubleshooting] duguet:
I an sorry for for the delay. I live in Germany and I use O2 ( umts frequency in the 2100 Mhz band) . I ordered the part from Hong Kong which Geronymous cited, didn't want to make specific advertising. The user is mingxing200808.

Regarding the question why does this affect the antenna, it is because antennas need to have a certain capacitive load in order to be adjusted and to transmit in a certain frequency range. If the antenna is not adjusted the signal will be reflected back . This capacitance is defined by the geometry of the antenna and might be changed/adjusted by elements connected to the end of the antenna. So the flex part acts as an adjusted capacity load for the antenna.

This is a very rough description, but I hopeit helps.

Greetings,
[Galaxy S II Q&A, Help & Troubleshooting] dave106:
Finally got my 3rd USB board and my signal has improved a lot! Hurrah! Got from tjuk1980 on eBay. This board is a darker blue, looks a lot better than my second board which was a lighter greener colour, the logo and writing didn't seem as clear as it does on the new one. Getting 3 of 4 bars on H+ at home where as before it would stay on G and if it did pick up 3G/H by chance it wouldn't show any bars.

Sent from my GT-I9100

Edit: picture of the dodgy board - this gave me crap service so avoid that one!
[Galaxy S II Q&A, Help & Troubleshooting] lations:
I just checked mingxing200808's listings, and the only flex cable for the SGS2 he's selling is Revision 1.3 (you can see it on the photo of the board)

You're all saying that his ones work the best, but it seems a bit weird to be installing an older version of the board... Any thoughts???
[Galaxy S II Q&A, Help & Troubleshooting] DaanE46:
I ordered the part from e-cell too, first one was a 2.2 which had this problem too.

They send me another part which was a 2.3 but this one had the exact same problem too.

Got my money refunded and ordered one from Hong Kong.. bought from seller "mxqtech".

I'll let you guys know if this one does work.
[Galaxy S II Q&A, Help & Troubleshooting] lations:
I just ordered a revision 2.3 from another seller called bigban2012. We'll see how it goes.
[Galaxy S II Q&A, Help & Troubleshooting] Menvaihelv...:
After been through hell and back trying to figure out why the hell I don't get a signal after I replaced the USB flex I found this thread... Please keep us updated how it went with the orders you did and which seller to buy from now, I guess I gotta replace this one!!
[Galaxy S II Q&A, Help & Troubleshooting] lations:
My replacement part arrived today - and another more serious problem has arisen - one of the screws on the back of the Galaxy S2 won't budge and is now worn down :( All 6 of the other screws came out perfectly, but one screw in the bottom left of the phone is completely stuck, I tried so hard to remove it but it won't move at all...what could be the reason? Is there glue in that area inside the phone that might've melted? It's terrible, I was waiting a month for my replacement part, and now I can't open it!!

Please help me if you have any advice!
[Galaxy S II Q&A, Help & Troubleshooting] specialjay10:
Can anyone tell me if this part is the same for both the I9100 and I777 versions of the galaxy S2?

I had the same problems, replaced my port and now have the same signal issues. I bought a part that says it's for the i9100 and I have the I777

Thanks!
[Galaxy S II Q&A, Help & Troubleshooting] lations:
Update:

I took the phone to a nearby hardware store, where a couple of friendly gentlemen racked brains for a while over how to get it out, then gave me use of their power drill (for free) and held the phone down for me while I drilled the little bastard screw out. Result: excellent. Stub of the screw is still in the bottom half of the phone, but it doesn't matter, I don't need a screw to be there anyway.

So anyway, this enabled me to open the case and replace the faulty USB flex cable/charging port - now it charges again!! :D

For anyone who's interested, my phone had a Rev 2.2 flex cable inside, and I replaced it with a Rev 2.3 - I'm yet to completely verify whether or not signal reception/3G quality is indeed worse after changing the flex cable (as many people have indicated) but it seems ok..?
[Galaxy S II Q&A, Help & Troubleshooting] Menvaihelv...:
So after getting hold of a seller that provides apparently genuine good quality USB flex parts I finally got the phone working again. Switched out the bad USB flex with this rev 2.3 and I get full signal with all bars.

Lations: Perhaps you could change modem and see if that get's you better reception?
[Galaxy S II Q&A, Help & Troubleshooting] m-bronze:
Which version was Your old/wrong USB flex and what is the name of the seller?
[Galaxy S II Q&A, Help & Troubleshooting] Jahngo:
Same problem here

I've been two months with the same problem since I replaced the bad USB circuit. No more 3g or H+ signals.

Please, any help will be appreciated...

:rolleyes:
[Galaxy S II Q&A, Help & Troubleshooting] Vobliks:
I have same problem with my phone. Unfortunately sellers which were given in this post does not exist anymore. Could someone name a seller with good USB flex circuit without 3G reception problems?
[Galaxy S II Q&A, Help & Troubleshooting] Serathian:
Found A Fix

Hey everyone!

I was reading through the forums regarding the problem at hand.

I also replaced my usb due to it being falty and lost all network signal.

After some reading i was seeing the only option is to buy yet another replacement.

I have found a fix for the problem as i do not wish to spend time buying replacements and hoping they are valid for my phone.

after reading on post of a man who changed his soldering on the usb board i tried something a little more drastic..

as i have a spare to hand i didnt have anything to lose by doing this.

I CUT the antennae part of the board off my original (just after the screw hold next to the mic)

And done the same to my new replacement part in the same place. i then put a small amount of black electrical tape on the now ''open'' ends of the boards and put them in the phone. I'm extremely suprised this worked, but it does. Seems the two sides of the board are not connected.

I now have full network signal, 3G+, Wifi works, Back speaker works, Mic works, phone chargers and connects via usb and transfers files. all the parts contained within that module seem to be working fine.

Enjoy
[Galaxy S II Q&A, Help & Troubleshooting] stefan600:
can you send me a picture please?

UPDATE:

just bought the one from the ebay seller "powerseller_nr" , maybe it's also good that there is written that it has ben sold about 285 times. also in the rating many people are saying everything is fine (product reference in the comments Nr.150811910429)

this is from a german forum, some people had the same problems:

this user wrote that he had only EDGE or GPRS , sometime H+ but then only weak signal. so he bought the replacement from this ebay seller and it works now.

a short while ago before i bought the usbflex , i called the seller in germany and he said that it is original and rev 2.3 (like in description) . he told me that rev2.2 is old an isn't produced anymore (because many of these had problems with the micro usb). Let's see if this new one helps.

i will give an update when i get my microusb flex and have tested it
[Galaxy S II Q&A, Help & Troubleshooting] Serathian:
This is the parts togeather in my phone. They overlap a small amout. I could trim the board down further but im happy it pushes the board up to insure contact with the module.

This is the two left over parts. As you can see i just cut them. Nothing special.

Only downside is that with the overlapping boards the case is slightly pushed open at the bottem of the battery slot.

As you can see i am sending this from my phone on the bus. Been using the phone all day not a single problem ocurred. Phone charged as normal over night. Currently connected to 3g+ network.
[Galaxy S II Q&A, Help & Troubleshooting] stefan600:
i also cutted the conductor plate , it works :good:

today i got the replacement of the ebay seller: "powerseller_nr"

it´s rev 2.3 and also works like a charm!
[Galaxy S II Q&A, Help & Troubleshooting] Cannabis_NL:
This works perfect i got my full signal back .Thnx :good:
[Galaxy S II Q&A, Help & Troubleshooting] evilv:
I had the same kind of experience. Started with the usual 'over voltage charging stopped' type of nonsense, and then I ordered a new charging port. It arrived, I fitted it and there was no signal. I'm not a newbie on this kind of thing so I knew I had connected it all up properly. I reconnected the old faulty part and the 3g signal came back full strength. There was about 25db difference in the signals and that is a MASSIVE difference - about 1/500,000th of the signal. The board I received had REV2.2 on it. I had the money refunded from the supplier and sent for another one - this time it cost £8 instead of £4.40 delivered.

I fitted the new part and got the full five bar signal at home which is what I am used to.

This is the ebay link to the good part I bought http://www.ebay.co.uk/itm/150912000314?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649

Since the link may die out the dealer goes by the name can888. The advert claims the part is a genuine Samsung part. It is stamped Rev 2.3.

Other hints and tips:

Take care that when fitting the board, you first remove the microphone grey rubber boot from the phone chassis and slide the little microphone unit into it before fitting the boot and board back onto the chassis. If you don't, you will have no audio out on your phone calls as far as your caller is concerned.

I am going to order some small rubber port covers from ebay to keep the new usb port clean. The mass of posts on the cause of the original failure seems to think that the port fails in the first place because of dirt/damp and humidity causing corrosion on the tiny tracks in the usb port. Once this has happened, the port will often not work again even after proper cleaning. I suppose a chip may die because of the short circuit.

Good luck
[Galaxy S II Q&A, Help & Troubleshooting] GOSSIO:
I have same problem but unfortunately.my usb dock was replaced by a lab

So i haven't the old part.

I replaced again with one from a destroid phon.and nothing.

I have still a very weak 3g signal -30db less comparing

My galaxy s3..I am helpless.

May be i will change provider with one that the reception is high
[Galaxy S II Q&A, Help & Troubleshooting] dennis5pia:
I have a similar problem. weak or none signal on one carrier on 2G (GPRS and EDGE) that carrier works on 900/1800/1900Mhz (Don't know what band it is using in here). I haven't try on 3G on this carrier (3G 900Mhz) since there is not 3G from this carrier on my town. the other carrier works fine 2G 850/1900Mhz, 3G 850Mhz.

The other problem is that the phone is not charging nor connecting to PC with this USB port. I think this USB part is faulty. Unfortunately I have bought a new one before reading this post.
[Galaxy S II Q&A, Help & Troubleshooting] Waggles:
So I got a new USB port replacement, and had the same experience; file transfers worked again, but very poor reception. Did the cutting method, totally worked. Speaker, mic, charging, usb connectivity all tested and working. My part was rev 2.2, and didn't have the grey boot on the mic; I'll probably go back in later and take the one from my faulty one (a 2.3 rev) and stick it on the 2.2.

Here's what I ordered: SamSung i9100 Galaxy SII S2 Charge Charging USB Dock Port Connector Flex Cable from gadgetfix

Also, I have an i777, the AT&T version, but it's the same part.
[Galaxy S II Q&A, Help & Troubleshooting] underhuggare:
I'd like to give another report of success of the cutting method, thanks Serathian!

I also replaced the original rev 2.2 with rev 2.3 which fixed the usb port but gave me very unstable and poor reception.

I decided to be a bit more daring with the cutting though; these are the spare parts from both flex cables:

As you can see they are cut so the parts fit the casing. There was some glue left on the antenna part of the old flex which keeps it in place (although i think it wouldn't move anyways due to the casing).

Images taken a few minutes ago with my S2, with which I'm sending this over a full and stable HSPA+ reception :)
[Galaxy S II Q&A, Help & Troubleshooting] bkd35:
Hi,

I have a problem with my microphone which was really weak (i can't have calls because people don't understand what i saying).

So i decided to change my USB Board. I buy one from eBay, but like here after changing it... no network connection (and still microphone weak) :)

I put the old card in my phone...and i get the network perfectly ( but still no microphone :( )

I would like to know if one of you get problems with the microphone with the USB Board replacement ?

Thx :)
[Galaxy S II Q&A, Help & Troubleshooting] TheGizmoJo:
So do you cut the old and the new board? or just one of them? I can't tell you guys are cutting one board or if you are cutting both boards and using the old left side with the new right side or vice versa.