Develop Bugs

[Q] Galaxy Note N7100 to N7105 by hardware conversion...

I am thinking to buy the GT-N7105 antenna and install it on a GT-N7100 then flash the software of a GT-N7105 on it, now there is no topics on this any where that I checked so here I am ...
My questions are:
[1] Have any one tried that, is it even possible?
[2] What are the possible complications?
[3] Is there any other differences between the 2 devices that may effect the process?
Thank you

Mada22009 said:
I am thinking to buy the GT-N7105 antenna and install it on a GT-N7100 then flash the software of a GT-N7105 on it, now there is no topics on this any where that I checked so here I am ...
My questions are:
[1] Have any one tried that, is it even possible?
[2] What are the possible complications?
[3] Is there any other differences between the 2 devices that may effect the process?
Thank you
Click to expand...
Click to collapse
1) No one has tried that I am aware of. I doubt it's possible either because the LTE controller chip probably isn't even physically present on the main board of the N7100; You'd need more than just an LTE antenna to get LTE to work.
2) Complications? The whole project. I mean, you probably don't have any of the precision equipment needed to properly install and solder new controller components onto your N7100 in the first place (assuming the N7100 and N7105 even use the same PCB at all!)
3) As mentioned already, you're likely going to need to install the LTE controller hardware before the antenna. This assumes that both the N7100 and N7105 use the same PCB; it's possible that they don't. If they don't then there's nor point in bothering, which bring me to my question:
Why? Why go through this process (assuming it's even possible in the first place) just to convert an N7100 to an N7105, when you can just go out and BUY an N7105? I mean, if you wanted an N7105 in the first place, why didn't you just get that?

Don't try that, its not going to work.

replace the main bored
but the main bored will cost about 3/4 of the phone price

Scratch out the "0" & draw in a "5" then
While on internet just lower your expectations.

Pat. said:
Scratch out the "0" & draw in a "5" then
While on internet just lower your expectations.
Click to expand...
Click to collapse
Exactly. Change build.prop to change about phone.
Good luck.
Sent From Samsung's Galaxy Note II Using Internet

Jade Eyed Wolf said:
1) No one has tried that I am aware of. I doubt it's possible either because the LTE controller chip probably isn't even physically present on the main board of the N7100; You'd need more than just an LTE antenna to get LTE to work.
2) Complications? The whole project. I mean, you probably don't have any of the precision equipment needed to properly install and solder new controller components onto your N7100 in the first place (assuming the N7100 and N7105 even use the same PCB at all!)
3) As mentioned already, you're likely going to need to install the LTE controller hardware before the antenna. This assumes that both the N7100 and N7105 use the same PCB; it's possible that they don't. If they don't then there's nor point in bothering, which bring me to my question:
Why? Why go through this process (assuming it's even possible in the first place) just to convert an N7100 to an N7105, when you can just go out and BUY an N7105? I mean, if you wanted an N7105 in the first place, why didn't you just get that?
Click to expand...
Click to collapse
well hope every one is done with the mocking .....
to Jade Eyed thanks allot for your reply here is my follow up
Well first of all I am one of the first few who got GT-N7100 even before any signs of GT-N7105 shows up, and lets not forget that Samsung did falsely advertise the Note II as a 4G device since the beginning with out mentioning any model numbers.
Where I stay just started getting the 4G services so it didn't matter to me to me at first, and it isn't cheap to just simply buy another device and have it shipped to you "they don't sell it here"
hope this clears up why did you get this and didn't get that drama...
I have some knowledge about manufacturing and I know it's very expensive to manufacture different variants of the same thing as totally different processes. That leads manufactures take a different approach to achieve just that.
[1] they produce the exact same parts with the exact same connectors how ever they simply don't put in the parts that connects to those connectors and make the difference between the variants.
[2] they produce the exact same parts for all the variants in early stages and just have it differ in a later stage of production (they print the same boards and send it to 2 different production lines where even the connectors aren't put on the board .
now I am not sure which method Samsung is using. If they were to use the first method that means it is as simple as i said in my first post (just get the needed parts and install them and then deal with the software)
how ever if they used the second method it would simply be near impossible to do as you really would need extensive knowledge of their design just in order to do that...
I will take a look at the parts and report back how ever I would like to start a real project out of this and see where does it go

Sorry to mock but your idea looked a bit daft as you can read plenty on XDA about the different variants of note2 around the world to realise that its far more complex than just swap a cheap part.
Better to sell yours & get a 7105 from
Negrielectronics for great price & they ship to loads of countries.

might have been possible I converted an SPH-L900 to a N7100 years ago
now that 4g is all that is provided in my country I need to bump my backup phone up to an N7105 , or swapout the internals of my cracked screened / broken cased n7105

[Q] Service Bars

Yesterday I replaced ad USB board (as an old one become faulty and I have had problems with charging the phone). I can confirm I used the appropriate board model.
Today I noticed that my service bars are not as good as they used to be. Generally in the room I usually used to talk and have weak 1 bar service, right now I have no service. I tested my phone outside as well and have a feeling like the phone has no as good perception as it used to have. Another words the service bars wen down everywhere about 20% or so. Phone works fine and I see no other problems. I wonder is there might be something that affects the service bars hardware-wise ? Any ideas appreciated.
ARTHUR

The antenna. I think we have 2, one for GSM and one for LTE.
Google for a picture with exact location and try to re-tighten them.
That's all I can think of.
Sent from my SGH-T889 using xda premium

premiatul said:
The antenna. I think we have 2, one for GSM and one for LTE.
Google for a picture with exact location and try to re-tighten them.
That's all I can think of.
Sent from my SGH-T889 using xda premium
Click to expand...
Click to collapse
Thanks for suggestions. Yes the one for GPS works fine as I have no problem with GPS (that is the one on a foil. The one for connecting to the tower is a straight wire. This wire goes from the little board (with USB port I've replaced) to the MB. I reopened the phone today and removed the antenna cable. Tested for continuity - OK, cleaned the connectors but still not luck.
I wonder if this could be some compatybility issue or deffective USB board. The board shows T889 rev1.0 so it sound like it's one of the first ones. Unfortunately I made a big mistake (to late) and thrown away old board. It had a problem with the USB post but there was no problem with the signal strength. I wonder if it is common for the usb board to go bad or if there is anything else I could possibly check. I ordered new antenna cable and thinking about getting another USB board, but if this will not fix the problem I'm clueless. I also restored the phone to factory settings to make sure it is not software problem. I need to use this phone daily at work and I'm really pissed off with the problems. PLEASE HELP
Thank you - ARTHUR

Just a question, ,, have you tried flashing the modem? Not sure it would help but maybe rewriting the radio files will help you.
Good luck

Nexus 5x no cellular service after screen replacement

TL;DR. Nexus 5x on Verizon has no cellular service after screen replacement. I changed my baseband to USA Base (a mistake?) and also did a factory 7.0 flash but still no service. Suggestions??
-----------
Hi all, thanks in advance for the help. I replaced my screen/digitizer on my Nexus 5x. I'm on Verizon. When finished, everything worked except I wasn't getting cellular service. It actually said Verizon but I wasn't able to make calls or use data (I did have one text message sneak through which was strange). Eventually I made my way to *#*#7636#*#* and changed my baseband to USA Base and since that the phone doesn't recognize verizon at all.
I've already tried flashing the google stock 7.0 image but that didn't work. I can't find any loose antenna wires like was a common problem on the Nexus 5, although I don't know exactly where to look either. Any suggestions? Thanks!

Only way to change back baseband is unlock device and install ROM which supports it, there is modified pure nexus rom, search on google.
Here is modified ROM https://mega.nz/#!UhZjHToL!qdIA_HybUdzBlSDjRO1Y7_4byl7w0wPlCw5dsLbwIDg
I think you also need appropriate vendor.
This known issue since device launch and there is no fix from Google, they just replaced device if you bought it from Google play store.

Thanks fanta110! Can you please explain what you mean by needing a vendor?
Also, I am in the US, so shouldn't USA Band work? From my research I could only find people living outside the US who had issues after switching to USA Band .

Update: I've managed to change the baseband back to "Automatic." Now, I get a some service but it's very bad. The sim card is being read, but the phone now spends most of the time on extended network or Verizon with zero bars. If I go to an area with really strong coverage I may get a few bars of LTE.
It's like I'm blocking the antenna or something. Any ideas? Again, this happened after a screen/digitizer/mid frame replacement.
Thanks!

I learned with my note 2 waaaay back to not ever get a screen replacement. It's a gamble. I had a very well known company do mine in Houston back then and it was never the same. Pissed me OFF!! Hope you have better luck.

SM210 said:
I learned with my note 2 waaaay back to not ever get a screen replacement. It's a gamble. I had a very well known company do mine in Houston back then and it was never the same. Pissed me OFF!! Hope you have better luck.
Click to expand...
Click to collapse
Well yeah, it's a gamble of $400 for a new one phone, $200 for a used one that may or may not work perfectly, or $50 for a replacement screen that may break something else. If I fix this issue, then I saved quite a bit of money! It was actually super easy to do and I simply think that either (1) I just need to have Verizon re-activate my phone or something like that or (2) I mucked things up by slightly damaging the metal sim card container when prying the battery out (in which case it was completely my fault for not getting the right tool - I was lazy and just had an over-sized screwdriver by me).
Come to think of it, is there any reason why (very slightly) denting the metal sim card holder might cause cellular connection issues? I don't see how since I don't think there are any antennas there (except for the wifi 2x2 MIMO SoC on the other side of it), but I'm certainly no expert. Again, my sim card IS being read, and I'm sometimes getting service - it's just terrible and often no service.

I have the exact same problem. My screen was replaced and now my reception is terrible, especially inside buildings. When walking outside is pretty good, but as soon as I take a few steps inside the house or even vehicles the reception drops to a few bars or "no network available" at all.
There seems to be no solution to this as far as I know. Maybe replacing the antenna, but I don't even know if that's physical possible.

jordylicht said:
I have the exact same problem. My screen was replaced and now my reception is terrible, especially inside buildings. When walking outside is pretty good, but as soon as I take a few steps inside the house or even vehicles the reception drops to a few bars or "no network available" at all.
There seems to be no solution to this as far as I know. Maybe replacing the antenna, but I don't even know if that's physical possible.
Click to expand...
Click to collapse
Jeez, for a long time there I thought I was the only person who had this issue! Unfortunately, I haven't found a solution yet. I definitely have a ~25dBA drop in cellular signal, though. That signal stays when the back cover is completely removed as well as the motherboard cover, so it's not that I knocked something loose on that side. I also pulled up each spring contact to ensure good contact but no go there either. My best guess is that the stock digitizer/screen/frame has some sort of booster in it somewhere that didn't come with my replacement.
Did you replace just the glass, the glass + digitizer, or the glass+digitizer+mid frame?

Skatersev said:
Jeez, for a long time there I thought I was the only person who had this issue! Unfortunately, I haven't found a solution yet. I definitely have a ~25dBA drop in cellular signal, though. That signal stays when the back cover is completely removed as well as the motherboard cover, so it's not that I knocked something loose on that side. I also pulled up each spring contact to ensure good contact but no go there either. My best guess is that the stock digitizer/screen/frame has some sort of booster in it somewhere that didn't come with my replacement.
Did you replace just the glass, the glass + digitizer, or the glass+digitizer+mid frame?
Click to expand...
Click to collapse
I'm almost afraid to say, but I had it replaced by a store. I'm an extreme n00b when it comes to engineering...
Anyway, I think they probably only replaced the glass. They told me it was a pain in the ass to order the glass anyway. 5X parts seem to be quite rare.

jordylicht said:
I'm almost afraid to say, but I had it replaced by a store. I'm an extreme n00b when it comes to engineering...
Anyway, I think they probably only replaced the glass. They told me it was a pain in the ass to order the glass anyway. 5X parts seem to be quite rare.
Click to expand...
Click to collapse
Hmm, they probably replaced all three or maybe just the screen and digitizer. If you ask the shop what the deal is and learn anything new, please let me know! My Nexus 5x is currently retired.

Maybe the cheap screens are missing something, theres a seller on ebay that has them for like 120 and claims there official lg. The same ones used in lg service center. There must be something crucial missing in the knock offs! Just google oem displays and its the most expensive. I guess you get what you pay for

Skatersev said:
Hmm, they probably replaced all three or maybe just the screen and digitizer. If you ask the shop what the deal is and learn anything new, please let me know! My Nexus 5x is currently retired.
Click to expand...
Click to collapse
I'll see what I can do. They'll probably say that it's not their fault.
Retired altogether eh? May I ask what phone you're currently using? I was thinking about replacements, but I can't really find anything in the same category. Maybe the Oneplus 3 but it's quite expensive.

jordylicht said:
I'll see what I can do. They'll probably say that it's not their fault.
Retired altogether eh? May I ask what phone you're currently using? I was thinking about replacements, but I can't really find anything in the same category. Maybe the Oneplus 3 but it's quite expensive.
Click to expand...
Click to collapse
It may still be worth asking; they may know what to do. Well I'm using my backup phone for the time being (Droid Maxx) until I figure out what to do.

any news about that antenna issue?
did you try replacing the antenna part "Replacement Main Loud Speaker & Antenna"?

jordylicht said:
I'm almost afraid to say, but I had it replaced by a store. I'm an extreme n00b when it comes to engineering...
Anyway, I think they probably only replaced the glass. They told me it was a pain in the ass to order the glass anyway. 5X parts seem to be quite rare.
Click to expand...
Click to collapse
The screen is the most common part you can buy, and there shouldn't be a problem to find one. You can use something like this, I'm currently using one and the network signal works ok.
Or, if you want the original one, probably you can find a cheap (same price or less than the previous one, <20$) 2nd hand bootlooped N5X phone in eBay. Either way, it's weird the poor coverage 'cos there's no antenna cable inside the phone. Could it be that they have installed a poor quality screen? Could it be that they have installed a non-original back cover or without the original parts (see image)? Could it be that they have installed a loose back cover and any of the connectors doesn't make a good contact?
The screen replacement is very easy in this phone, anybody can do it with basic tools: https://www.ifixit.com/Teardown/Nexus+5X+Teardown/51318

Thank you for replying, but I had no idea this thread was still open. By now I haven't used the phone for a while. I updated to the oneplus 6, dropped that and the screen stopped working so now I'm using a cheap backup phone until I've got some money to replace my oneplus 6

Replacing the C port PCB Assembly

That rascally Samsung C port assembly.
There are at least two variants. They look identical except for the part number.
The international P/N variant ends with an "U".
The USA AT&T variant ends with a "A".
The AT&T model number is SM-N975U.
What could go wrong?
Sort of counterintuitive but a good parts provider would surely be up to speed.
Not.
So what happens you ask if the two parts are inadvertently interchanged?
The phone charges normally, even fast charges.
Wifi works.
Everything is fine except there is no mobile connection.
How this little PCB with a couple mosfets, no chipsets and identical connections does this is testimony to the Samsung's inscrutable ineptitude.
This can also occur with the cam module.
Fun times

Or something else, not the port assembly, is causing the mobile connection problem...

OnnoJ said:
Or something else, not the port assembly, is causing the mobile connection problem...
Click to expand...
Click to collapse
Put the old one back in and it was fine... was changing the battery and wanted to swap out the port.

blackhawk said:
Put the old one back in and it was fine... was changing the battery and wanted to swap out the port.
Click to expand...
Click to collapse
I think that on the latest updates Samsung has been locking components like apple. Wrong SN or ID and it will fail either functionality or signal.
Monopoly starting
Happens with the A51 for example, cam changes - Fail
The only way it should be possible would be a downgrade and then change parts. After that upgrade again perhaps. Don't know where or how it's being locked.
This blows chunks alot.

Charge port replacement but now no signal.

Hi there. I recently change the charging board on my note 10 plus but since then I have had no signal. It seemed a pretty easy swap with no complications when fitting. Anyone have any ideas?
My phone is a note 10 plus N9750.
Thank you
Kind regards
Jonny

If you were tinkering while the mobo was plugged in then chances are you damaged it.
Samsung Galaxy Note10+ Daughterboard Replacement
Use this guide to remove or replace the...
www.ifixit.com

ze7zez said:
If you were tinkering while the mobo was plugged in then chances are you damaged it.
Samsung Galaxy Note10+ Daughterboard Replacement
Use this guide to remove or replace the...
www.ifixit.com
Click to expand...
Click to collapse
Ah that will be a shame, I was hoping not to buy a new phone just yet. I have ordered another board just to see if that fixes it.

Wrong PCB. There's more than one variant for the N10+!
It happened to me, no phone or internet connection.
Check the old PCB for it's PN, that's the one you need. It will work perfectly once it has the right part

blackhawk said:
Wrong PCB. There's more than one variant for the N10+!
It happened to me, no phone or internet connection.
Check the old PCB for it's PN, that's the one you need. It will work perfectly once it has the right part
Click to expand...
Click to collapse
Ah I was wondering that. I have the N9750 as I was being cheap and got it from abroad on ebay.
I stupidly chucked the old one away as it looked like it was all fine but it was just wifi calling I had.

hemmjonny said:
Ah I was wondering that. I have the N9750 as I was being cheap and got it from abroad on ebay.
I stupidly chucked the old one away as it looked like it was all fine but it was just wifi calling I had.
Click to expand...
Click to collapse
Been there, done that. Rude surprises
PN#'s matter

My mate has the same model as me. I am hoping he may let me take the back off .
Thanks for all your help. Least I have a good idea what the issue is.