I have a very unusual question. I have a bootloader locked Verizon S4 that has a broken LCD and an AT&T S4 with an unlocked bootloader that works perfectly fine. Knowing my Verizon SIM won't work on the AT&T model and being a flashaholic, is there any way I can tear each of them down and potentially switch the hardware (ie. AT&T's mobo with Verizon's modem or vice versa) in order to keep the AT&T phone with CDMA network from the other phone's hardware and use my Verizon SIM?
I'm sure there is no in depth guide anywhere about such situation but some insight would be appreciated. Thanks!
And this is all cause I lost my Nexus 6
Might be better asking in the at&t or Verizon forum
While this is the completely wrong place to ask this, being the International S4 forum, the answer to you question is "no". You cannot mix and match parts like that as the motherboard of the SCH-I545 is designed differently from that of a SGH-I337. What you'll need to do if you want to use CDMA on the AT&T S4 is mess around in the service menu of the AT&T S4 and change from GSM to CDMA. Even then, there's no guarantee that will work. Assuming the AT&T S4 is carrier unlocked, you would still have an issue of potentially not getting service, as I believe Verizon requires phones to be registered on the network before they can be used. Worse, you may lose LTE service due to Verizon policies.
You'd be better off just replacing the broken screen and midframe. Less hassle, though much more expensive.
Prouder said:
I have a very unusual question. I have a bootloader locked Verizon S4 that has a broken LCD and an AT&T S4 with an unlocked bootloader that works perfectly fine. Knowing my Verizon SIM won't work on the AT&T model and being a flashaholic, is there any way I can tear each of them down and potentially switch the hardware (ie. AT&T's mobo with Verizon's modem or vice versa) in order to keep the AT&T phone with CDMA network from the other phone's hardware and use my Verizon SIM?
I'm sure there is no in depth guide anywhere about such situation but some insight would be appreciated. Thanks!
And this is all cause I lost my Nexus 6
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Wouldn't recommend you doing that, probably just screw up both devices. What you could do is replace one devices lcd with the working one. Much easier.
Actually, it's not that easy. He'd have to heat up the AT&T and Verizon S4 screens to peel them both from their midframes. If he didn't permanently damage the AT&T screen through use of a heat source like a heat gun in loosening the adhesive which bonds it to the midframe, he would then have to apply new adhesive to the Verizon midframe, and then place the AT&T screen on top.
Too much risk for too little reward, as there are too many opportunities to break an extremely thin screen. That's why he'd be better off buying a I545 screen/midframe replacement and moving the innards to the new midframe.
Strephon Alkhalikoi said:
Actually, it's not that easy. He'd have to heat up the AT&T and Verizon S4 screens to peel them both from their midframes. If he didn't permanently damage the AT&T screen through use of a heat source like a heat gun in loosening the adhesive which bonds it to the midframe, he would then have to apply new adhesive to the Verizon midframe, and then place the AT&T screen on top.
Too much risk for too little reward, as there are too many opportunities to break an extremely thin screen. That's why he'd be better off buying a I545 screen/midframe replacement and moving the innards to the new midframe.
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Or just change the digitizer.
The screen and LCD on the AT&T is fully functioning so I don't have to peel off anything. I guess I'm stuck with a bootlocked S4
Thanks for the replies
yilun said:
Or just change the digitizer.
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That's just as bad, because you still have to heat the screen to loosen the optical adhesive bonding the digitizer to the screen. You also run the risk of cracking the screen when you try peeling parts of the digitizer off. Twist the tool you're using to pry the two apart just wrong and you'll kill the screen. You should search back about two months. There was a poster who had asked whether his screen could be saved, after he had tried peeling off the digitizer. Just from the picture I could see his screen was toast, and told him so.
He went and bought an assembled digitizer and midframe off ebay, transferred the sensors and boards to it and has a perfectly working S4. After seeing enough people on YouTube and here break their screens trying to go the cheap route, I know for a fact the cheap route is not the best route.
Related
On incipios website the brig case is only available for tmobile/sprint models, not at&t. but on daydeal.com they have the brig listed as at&t tmobile and sprint. does anyone know if theres any diffference betwen tmobile/sprint and the at&t version that would require a differently designed case?
I'm wondering the same for VZW, which I think it actually different.
Not entirely sure the answer to your question.
Pretty sure the VZW variant is the only one that is actually different. The rest all have the same body, but the VZW is slightly bulkier because of the wireless charging. 99% positive.
thewihlygeek said:
Pretty sure the VZW variant is the only one that is actually different. The rest all have the same body, but the VZW is slightly bulkier because of the wireless charging. 99% positive.
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yeah turns out daydeal is wrong. the att has a little microphone hole on the back to the upper right of the camera lens that the tmobile sprint models dont have and the att cases have a cutout for it. i ended up getting the diztronic tpu case and its very very nice
Greetings, I can't seem to find a definite answer or guide to this. I have a sprint galaxy s4 and once my contract was up I was looking to get off sprint and onto another contract, looking at verizon as my friends happen with them. I know they both use cdma. If I have them unlock the phone, can it be brought over and used that easily? If not, what must I do? Custom root? Find a verizon s4 motherboard with clean esn? I'm willing to do it to not spend a few hundred bucks on a new phone. I'd liketo give it to my mother and get the s6 for myself when it comes out.
Man, I'm 0 for 2 here. Anything?
bump?
Another bump. Can anyone help me?
94 views, not a peep. I thought these forums were active and helpful? Perhaps not?
All of my research leads me to believe I'd need to get a verizon logicboard with a clean esn. Maybe I can trade for one, but I would like some confirmation before I spend the 80 bucks or so. Thanks.
Dabba87 said:
Greetings, I can't seem to find a definite answer or guide to this. I have a sprint galaxy s4 and once my contract was up I was looking to get off sprint and onto another contract, looking at verizon as my friends happen with them. I know they both use cdma. If I have them unlock the phone, can it be brought over and used that easily? If not, what must I do? Custom root? Find a verizon s4 motherboard with clean esn? I'm willing to do it to not spend a few hundred bucks on a new phone. I'd liketo give it to my mother and get the s6 for myself when it comes out.
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is your phone still locked on sprint?
xDroidZz said:
is your phone still locked on sprint?
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Hello DroidZ,
It is. I was planning to have them unlock it. But I heard that though both are CDMA, I wouldnt have full 4g with it. I was contemplating buying a verizon (or any other carrier's logic board that I would switch to) and sell my sprint board.
Of course I'd need a clean esn right?
Another bump. Does the lack of responses mean it's harder than a logical board swap?
bump again
Bump
You can use the Sprint S4 on Verizon, assuming it's possible for you to unlock it from Sprint's network, but LTE will never work. Verizon uses standard LTE frequencies (750 & 1700MHz) while Sprint uses "Extended PCS", i.e. Spark. Totally different technologies.
You'll need a new phone to take full advantage of Verizon infrastructure, which unfortunately means dealing with an encrypted (locked) bootloader.
Strephon Alkhalikoi said:
You can use the Sprint S4 on Verizon, assuming it's possible for you to unlock it from Sprint's network, but LTE will never work. Verizon uses standard LTE frequencies (750 & 1700MHz) while Sprint uses "Extended PCS", i.e. Spark. Totally different technologies.
You'll need a new phone to take full advantage of Verizon infrastructure, which unfortunately means dealing with an encrypted (locked) bootloader.
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Greetings,
Does that mean swapping the logic board with a verizon version won't fix the LTE problem? So I'd get normal 4g? I suppose I could try it. Couldnt deal with 3G. I guess I'm asking if there are any parts I could swap out to fix the problem or if I'm just screwed.
Thanks man.
Dabba
If you have a Sprint phone, you cannot simply purchase a Verizon motherboard and replace the Sprint motherboard with it. Why it won't work is because the design of the two motherboards is sufficiently different that if you tried it the Verizon motherboard wouldn't fit in the midframe.
In simpler language, you're screwed. You need a new phone if you want LTE. Whether that is a new phone from Verizon or a used device off Swappa is irrelevant, so long as the MEID is clear.
Hmm, I didnt know the motherboards were actually different. That sucks, I assumed they were more like computers. Oh well, thanks for the info though, now I know!
Again, thanks a bunch
Hey folks. Just got my S4 I337M back from sending it away with Rogers for repair. I was foolish and didn't think about how I flashed it previously, so it got sent back not fixed, with the paperwork claiming mainboard failure. I'm more than happy to fix this privately, but I'd like to shop around for the part myself. Problem is that the price is very inconsistent between provider brandings. Is there a difference between them at all, so long as it isn't a mini or value edition or whatever other branding? I just want to get the cheapest fix available for this thing so I can cost out the difference to just getting a new phone. Thanks for any info.
Then you are better off buying a phone with a busted screen and just replace the motherboard.
Do take into account that some providers lock the bootloaders. Also take into account that the S4 variants all not all the same, so not every motherboard might fit in perfectly.
GDReaper said:
Then you are better off buying a phone with a busted screen and just replace the motherboard.
Do take into account that some providers lock the bootloaders. Also take into account that the S4 variants all not all the same, so not every motherboard might fit in perfectly.
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Not to be ungrateful, but this only rephrases my initial question. I'm aware that there are several variants and that there are several methods of acquiring the board, either new or from a busted phone. My question is which boards wouldn't be compatible with the I337M variant.
JavaMac said:
Not to be ungrateful, but this only rephrases my initial question. I'm aware that there are several variants and that there are several methods of acquiring the board, either new or from a busted phone. My question is which boards wouldn't be compatible with the I337M variant.
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You are changing the whole board, not just one small part from the board. This includes the ram, processor, internal memory and such, right?
So the only incompatibility issues there may be are the frame and board sizes. Theoretically you can put any other S4 board in there (as long as you change the whole motherboard and daughter board).
But I doubt there is any way to tell which fits in what, unless you try it.
Just get one from another I337M is my suggestion. Hope this is somewhat more clearer now.
There are two options for an s4 from a Canadian carrier: sgh-i337m (Telus, Rogers, Bell) or sgh-m919 (Wind, Videotron).
For the i337m, it does not matter which carrier sold the phone as the hardware is identical and ROMs from sammobile.com for the i337m can be cross flashed among carriers. The only difference is the pre-installed apps. I have a Telus s4 (came with 4.4.2) that I flashed with Bell 5.01 firmware. Same applies to the Wind/Videotron version of the s4.
In the i337m and m919, there are connections for USB flex cable, cameras, headphone jack, LCD, and wi-fi cable. No other boards that I noticed.
If you want a motherboard with a busted screen, check out Kijiji or craigslist. Just make sure the imei has not been blacklisted, and the wifi and sim reader work.
GDReaper said:
You are changing the whole board, not just one small part from the board. This includes the ram, processor, internal memory and such, right?
So the only incompatibility issues there may be are the frame and board sizes. Theoretically you can put any other S4 board in there (as long as you change the whole motherboard and daughter board).
But I doubt there is any way to tell which fits in what, unless you try it.
Just get one from another I337M is my suggestion. Hope this is somewhat more clearer now.
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There's plenty of ways to tell, like asking someone with a working knowledge of these devices, which is why I'm on this forum. To learn and apply. Speculation isn't useful.
audit13 said:
There are two options for an s4 from a Canadian carrier: sgh-i337m (Telus, Rogers, Bell) or sgh-m919 (Wind, Videotron).
For the i337m, it does not matter which carrier sold the phone as the hardware is identical and ROMs from sammobile.com for the i337m can be cross flashed among carriers. The only difference is the pre-installed apps. I have a Telus s4 (came with 4.4.2) that I flashed with Bell 5.01 firmware. Same applies to the Wind/Videotron version of the s4.
In the i337m and m919, there are connections for USB flex cable, cameras, headphone jack, LCD, and wi-fi cable. No other boards that I noticed.
If you want a motherboard with a busted screen, check out Kijiji or craigslist. Just make sure the imei has not been blacklisted, and the wifi and sim reader work.
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Awesome. Thanks for the info here.
Hello, I want to buy galaxy s7 edge and it has many model numbers
what I'm looking for is 2 things
1- to operate CDMA and GSM network...
2- support from samsung updates and custom ROMs here in XDA because I have galaxy note N9005 and has many ROMs but galaxy note 3 verizon doesn't have even more than 20 Roms
I prefer if it to have only has only 1 slot but 2 slots is ok in case it has more support
Please help
Hmmm, you have to pick a specific carrier. There is no such s7 edge that has all you currently want
Sent from my SM-G935F using Tapatalk
There are only 3 versions that support CDMA, and those are Verizon, Sprint and the Chinese version. I wouldn't count on the Chinese version supporting all the necessary bands in the US.
The Sprint and Verizon versions support GSM radios for international roaming, and can be carrier unlocked to support US GSM carriers (but I'm not sure if they support all the right bands or not).
Neither the international nor the AT&T and T-mobile versions will support CDMA.
But none of the U.S. phones can be rooted now. Maybe never. So there's no phone that will meet all your requirements. You'll have to choose between CDMA support (Sprint or Verizon models) or rooting (International Exynos version) which will work on AT&T and T-Mobile.
I have a few quick questions. Does the Exynos model support band 30 (or whatever AT&T's new band is)?
How do screen protectors work on the Edge? Particularly non glass protectors? They seem like they could be problematic with the Edge curve.
I've heard Apple like horror stories of the entire phone shattering from drops. I'm not one to drop my device very often but this worried me a bit. Any insight?
Don't know about the Exynos and AT&T.
Look in the accessories forum. There are some film-type screen protectors that seem to work fairly well, although using them with a case can be a problem. There don't seem to be any good fitting glass protectors available.
I dropped my Edge and shattered the screen. First phone ever I've broken the screen on. That said, every model of phone available has been broken by someone. It all depends on how the phone lands, and what it lands on. But logic says a glass back is going to be more fragile than a plastic or metal one, and that the curved screen increases the likelihood of the screen breaking if the phone lands on it's edge.
The edge is the first phone I've put a case on, and the first I've gotten insurance for.
I currently have a S7 Edge from AT&T (G935A). Since carriers in the U.S keep bootloaders locked I was wondering if it could be possible to swap my motherboard with an international one (G935F) in order to install custom roms, magisk, etc etc. Do the motherboards vary in dimensions? Are the connections all the same? I read that the cameras may have slight differences in size.
zmbi3 said:
I currently have a S7 Edge from AT&T (G935A). Since carriers in the U.S keep bootloaders locked I was wondering if it could be possible to swap my motherboard with an international one (G935F) in order to install custom roms, magisk, etc etc. Do the motherboards vary in dimensions? Are the connections all the same? I read that the cameras may have slight differences in size.
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Not sure if it would work, on top of that, another question would be does the g935f work with AT&T?
Have you taken a look at this thread:
https://forum.xda-developers.com/s7-edge/how-to/guide-sm-g9350-s7-edge-qualcomm-sd820-t3410969
it doesn't say anything about unlock bootloader, but it does give you root.
zmbi3 said:
I currently have a S7 Edge from AT&T (G935A). Since carriers in the U.S keep bootloaders locked I was wondering if it could be possible to swap my motherboard with an international one (G935F) in order to install custom roms, magisk, etc etc. Do the motherboards vary in dimensions? Are the connections all the same? I read that the cameras may have slight differences in size.
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Hei! Have you managed to swap MoBo's? I want to do the same thing with my galaxy s7's but I don't know the cons of this kind of operation. Am I gonna loose water and dust proof resistance? The guys who do this kind of "surgery" can destroy pins, connector etc and the battery?
The screen and the digitizer are sticked to the MoBo? Can they be separated?