Hello there, my friend bought pretty cheap S7 from EBAY, everything was new, un-opened package, brand new phone.
BUT when he tried to flash it, then the problems started - Odin won't flash G930F firmware on this phone, then I started to research
- Model on package: G930F
- Model on back of the phone: G930F
- Model on the sticker on the back: G930F
- Model on device info and baseband: G930F
- IMEI number the same on: package, back of the phone (on the glass), sticker on the phone
buuuut:
- Bootloader versions starts with: G930A...
- CPU-Z showing Qualcomm CPU
Anyone know what's going on? The sim-card works in EU (Poland), LTE (4G) working, everything woking. I just can't flash G930F firmware because Odin won't let me to do so and DOWNLOAD MODE says G930A.
The software is only partially translated from what I saw...weird thing. Also on package there is a big sticker "EUROPEAN SIM CARD ONLY"
Maybe somehow I can force G930F bootloader flash? I don't care if it'll be bricked. Of course if there is a 99% brick chance, let me know
Can someone help me? Cheers!
You might have a fake device.
https://www.youtube.com/watch?v=AzKnmffM2K4
@sergatiuk - noo, of course it's not the case! I wouldn't be so dumb to try to recover chinese phone
I had S7 (real G930F) for 2 years before. This one I'm trying to repair is 100% the same, original phone. There is only something wrong with the firmware
Update: in recovery it says: samsung/heroqlteuc/heroqlteatt
7.0/NRD90M/G930AUCU4BQA6
Cool ! just making sure - I did get one of those lovely chinese S7s once...LOL
Best of luck figuring it out
I think I found something on a Russian forum:
Hello
Many in the same case receive after the purchase:
-a samsung GALAXY S7 Engraved SM-G930F on the back
-in terms of nougat parameters 7.0 for my case, all suggests that the s7 is a SMG930F version (can read BASEBAND G930FXXS4BQC1, same value for BUILD NUMBER). We could stop there but ...
... it is indeed a samsung SM-G930T (usa version on t-mobile operator) made up in SMG930F (global version), the latter being easier to sell and more profitable than its American counterpart since well better equipped processor level and frequency bands, although it has everything you need to capture the full potential 4G / LTE AND 4G + / LTE A in Europe and elsewhere. (see below or go to GSM ARENA)
We can say that we did not get out badly in the end, but the phones are undergoing unexpected changes software and unless otherwise opinions not possible with a tool like Odin on pain of getting the famous message "SECURE CHECK FAIL: (PIT) ".
With the application phoneinfo we get some rather intriguing details about the Rom:
1 an original bootloader so US G930TUVS4BQC1 (its role is similar to the bios, it is included under the acronym BOOT in odin)
2 a version of the original baseband so US and not European (this time the real value G930TUVS4BQC1 is obtained with the app phoneinfo or similar)
3 the OS is European G930FXXS4QC1 (pda or pa in odin)
4 an original csc (country dirty code) so US SMG930TTMB4BQC (csc in odin, here it is a single csc TMB so T-mobile)
5 a knox counter at 0x0 despite all this
The actual version of the bootloader ALSO appears in download mode, the bootloader remains unchanged in order to exploit the configuration of the motherboard of origin, which remember the American is equipped with a processor qualcomm 4 cores instead of exynos Octa cores for non-US versions, which is of course confirmed by the application.
On the network side, the network card will capture all the European bands in 4g / 4g + 3, 7 and 20:
GSM / HSPA / LTE
2G bands GSM 850/900/1800/1900
3G bands HSDPA 850/1700 (AWS) / 1900/2100
4G bands LTE band 1 (2100), 2 (1900), 3 (1800), 4 (1700/2100), 5 (850), 7 (2600), 12 (700), 13 (700), 20 (800) - G930A
That said, we realize that we are doing now with 4 cores less CPU level, and a band in less 3g (900mHz little or no impact).
For the winnings and unless I am mistaken, the GSM ARENA website indicates a micro SD slot that can accept up to 512GB against 256GB for other versions outside the USA.
Much more than a simple detail, OTA updates require a concordance of elements 3 and 4 contained in the firmware, which is not the case at all as described above. The solution is to reciprocate by flashing with ODIN for example an official ROM of the operator t-mobile, ATT, sprint or verizon depending on the case to match the CSC with the PDA. No worries to be level network, we keep all the frequency bands mentioned above after the installation of the original roms so 2g / 3g / 4g / 4g +
In summary, the phone has been set with a mix just enough to sell a samsung American under false air of global version if you do not look properly ... but still the update impossible to achieve should to arouse the suspicions, at least, as long as the scam is worked out that way.
Click to expand...
Click to collapse
Hi,
A bit late I know, but I am in exactly the same situation.
Last month, I bought a G930F which has a G930A (Snapdragon) mainboard.
Its a boxed G930F and the case has the same IMEI and 'G930F' engraved on it as on the original box. Note the serial number engraved on the case does not match the serial number reported on the phone.
I've put the details here...
https://forum.xda-developers.com/att-galaxy-s7/help/sm-g930f-actually-sm-g930a-boot-loader-t4018649
I think its been repaired rather than faked.
@Kamikiri , What did the you do with your phone in the end?
I am thinking of updating to a G9930F UK CSC and latest G930FXX PDA or perhaps latest G930U Firmware (AP,BL,PDA,CP & CSC) - any reason why I shouldn't or any gotcha's?
Any clues would be appreciated!
BestW,
YYo
Related
Hello My Friends
Sorry English Not First My Language
i Want Buy This phone G930F Verizon Carrier
Can i use this phone With 2G Network By Change rom or any way ?
See Attached Photo To This Post to know what i,m talking about .
Regarding the observations of the professors can i use this phone on 2G netowrk ?
Verizon doesn't do G930F models, Verizon's are G930V's. They come with different network modems intended for US carrier networks which differ to international, also a different CPU chipset and locked bootloader.
So I'm pretty sure it's a fake and why it says LTE / CMDA / UMTS and not LTE / 3G / 2G, because it's a G930V faked to look like a G930F. For reference my G930F says LTE / 3G / 2G under that menu.
A G930V can't be flashed with a ROM because it has a locked bootloader.
If you can boot into download mode without the seller noticing (Vol down + home + power) the real phone model will be in there.
Hello,
I have a S7 SM-G930F with G930FXXU2DRA9 official ROM, without root and I noticed a problem on the aggregation of frequency bands.
My mobile operator uses 800Mhz (B20-FDD) and 1800Mhz (B3-FDD) tapes to make 4G + at 150Mbps.
The S7 is unable to aggregate these two frequencies, I also tested my sim in an S7 edge and same problem.
In the menu engineer with the code * # 0011 # I see that the S7 hooks well the two frequencies but without the aggregates.
Which means that I only have normal 4G on 1 frequency.
I put a sim of another operator in my S7 which has a 4G+ network with 800Mhz + 2600Mhz, and I have 4G +.
To see if it's not my sim that's the problem, I put it in a Oneplus 5t and there I have 4G + with 800Mhz + 1800Mhz.
The problem come from the S7 who do not want to aggregate.
Have any of you noticed that?
If I install a custom rom or flash modem, will that fix the problem?
Flashing your carriers Home_CSC and CP files are probably your safest bet. But if you bought it from your carrier then it should already have these, if you didn't it's probably using the stock CSC which may not be configured for your carriers network.
updato.com or sammobile.com should have firmware for your carrier, if you don't want to lose data make sure to flash home_csc. Normal CSC will wipe.
Hello,
I had thought but my operator does not sell branded phones, so no modified csc.
There is just one application that the operator makes available to automatically set up the APNs, that's all.
So I flash the modem + the csc from 3 other operator in my area using the same standard 4G FDD, the problem remains the same.
The only change is that I had a better network hang on some modem.
This is strange it is as if on the combination 800Mhz + 1800Mhz the Carrier aggregation is disabled, and that as soon as there is a higher frequency, 800Mhz + 2600Mhz, the Carrier aggregation is activated.
Unfortunately the Hidden Engineer Menu, allowing to make deeper changes to the connection mode has been disabled with Ota samsung
Phone A (mine): G930FD, Superman Android 7
CSC: UK-BTU multi-csc
SIM: StraightTalk T-Mobile towers
APN: StraightTalk
Phone B (friends): G930V, Stock Android 7
CSC: Verizon multi-csc
APN: MetroPCS
My friend got phone B for her MetroPCS sim (which uses T-Mobile towers I think), it didn't work at all. I tested phone B with my StraightTalk T-Mobile sim, it worked, speed test: 42mbps.
Then I decided to try the speed test with my phone A in the same location (a few hours later) and my StraightTalk T-Mobile sim, 12mbps
There are so many varying factors. Which are the ones that matter? My G930F supports more bands and has my proper APN settings, I would think it would be equivalent if not better... I'm guessing it's primarily the BTU CSC? I'd tried T-Mobile CSC but that caused issues. And that other phone is a Verizon CSC anyway. Should I flash to Verizons CSC? Also I'm using Superman ROM.
Also, why wouldn't her MetroPCS sim work in phone B? It worked with mine and they both use T-Mobile towers...
The most important factor here is the phones are completely different SoC with different modems.
The G930FD is Exynos and the international model, the modem is built to the international standard of carrier networks.
The G930V is Snapdragon and the modem specifically designed to make use of the USA network standards which differ to the rest of the world.
So even with the required band support, it's different technology. Outside of the USA, I would expect the G930V to perform worse than the G930FD, and vice versa for inside the USA.
As for why the SIM doesn't work, the G930V is the verizon variant, which is default carrier locked. Since your SIM works it may have been carrier unlocked, but it might not be.
I have an SM-G935V phone. I have flashed the "G935U" Nougat on it to get rid of the VZW bloatware. Eventually I even got the Oreo OTA update. U version. The LTE bands remained unchanged after flash and upgrade to the "V" ones.
Now, I am using it on a VZW MVNO, so LTE bands where OK for me. Because I am curious, I have added all the LTE bands that the U version would have using the Qualcomm software, as described here:
https://forum.xda-developers.com/galaxy-s5/general/how-to-add-rf-lte-frequency-bands-to-t2886059
The NV cell #06828 for my original V radio had the value 4190. That means LTE bands 2,3,4,5,7,13.
I have changed that cell value to 2062440470751. That means LTE bands 1,2,3,4,5,7,8,12,13,20,25,26,29,30,38,39,40,41 (like they are on the U hardware, plus band 13 that is not found on the U).
Didn't add B17 because presently it's just a subset of B12.
Well... when I have traveled in EU, band 20 didn't seem to work. But I admit I didn't do extensive testing.
Now, in US, I had the occasion to test an AT&T SIM. To my surprise, I found out that bands 12 and 30 seemed to have appeared, and I even had CA with band 2 (LTE+). So it seems that that worked... see the pics from service mode.
Band 2 with CA on 12, band 12 with CA on 2 and band 2 with CA on band 30.
I just received, on my SM-G935V hardware, the latest Oreo "U" update (G935UUES4CRG3). I have install it and... of course the LTE bands reverted to the "V" ones, like always.
I have changed them back to the more inclusive set like I did before, however I took a screenshoot of the original LTE band NV value - for whoever is interested. The number is 4190 and that translates into LTE bands 2,3,4,5,7,13. Most of the sites quote more bands for the G935V, but I guess nobody really took the time to actually verify that.
And no, as you can see, just flashing the "U" firmware over "V" won't add any of the missing bands. Those band settings are stored somewhere else, in the modem non-volatile memory.
Did more experimenting. Changing the SIM with another one triggers the re-flashing of the CSC with the new one. Well... surprise the AT&T SIM added the needed bands with CSC ATT.
Picture attached.
Putting back the Tracfone SIM, CSC code was re-flashed (TFN) and... NV was re-written with the 4190 one (LTE bands 2,3,4,5,7,13).
See attached the pic of the Service menu *#2263# from AT&T CSC listing the bands. I can't take screenshoots from the TFN one, because that SIM blocks the Service RIL menu.
So, modding the bands can be useless, because it gets re-written by the CSC settings at every SIM change.
I found out how to enable the Service Menu *#0011# on my Verizon SIM, in case that anyone is interested.
The dialer code for enabling is *#22745927 , followed by MSL "000000". If your phone is carrier locked, the MSL will be different.
I just came back from a visit to Spain, Vodafone SIM, and I saw LTE bands 3, 7 and 20 working on my S7Edge Verizon with the "U" firmware - I have used cellmapper to map the towers.
No modding was needed, maybe because those are also present in the underlying V hardware.
Very nice write-up. I'll have to try that!
I read that I can install the firmeware of sm-935U in my sm-935V, but when i enter in sammobile page ,there is a huge list of 935U firmeware, wich of those do i have to select to work fine in my phone
So I bought a T-Mobile unlocked Galaxy S7 (SM-G930T) after reading that there was no difference between unlocked phones except for bloatware. It seems now like that was not entirely correct. My H2o Wireless sim uses the AT&T network, but in my new phone it gets little or no reception almost everywhere I go. It works great in the unlocked Nexus 5 that I'm trying to replace. I have found some scary instructions on these forums and elsewhere that would enable more frequency bands or convert my phone to a SM-G930U. Is that the right way to go, or is there a simpler way to get my old sim card working?
The different variants of the S7 come with carrier specific firmware, so the T-Mobile firmware may not use the modem in the same way as AT&T expects.
Flashing the G930U firmware is probably a good idea, and it's not too difficult http://updato.com/how-to/how-to-install-an-official-samsung-stock-firmware-using-odin
I was also under the impression the G930T was SIM locked by default, unless you got them to unlock it.
Beanvee7 said:
I was also under the impression the G930T was SIM locked by default, unless you got them to unlock it.
Click to expand...
Click to collapse
This G930T was labeled "T-Mobile unlocked" on Ebay. I doubt that it got any special treatment. My H2o sim card works, just not very well.
Digging a little deeper, the app Network Cell Info Light tells me I'm using bands 2, 4, and 12. It also tells me I'm using band 5 if I run a USSD code. Bands 2, 4, and 12 are used by both T-Mobile and AT&T, so those make sense. Band 5 is used by AT&T but not T-Mobile, so I don't know why they have that one enabled (or maybe the list of bands I found is wrong). Unfortunately, the same app doesn't display which bands are in use by my Nexus 5 so I can't compare. If I could use AT&T's other bands (17 and 30) maybe things would work better.
Flashing the G930U firmware or even the G930A firmware (although I think the G930A is now the G930U) could change the bands. All of the USA models use the same modem, so if some bands are enabled on one and not the other, it would entirely be firmware.
Beanvee7 said:
Flashing the G930U firmware or even the G930A firmware (although I think the G930A is now the G930U) could change the bands. All of the USA models use the same modem, so if some bands are enabled on one and not the other, it would entirely be firmware.
Click to expand...
Click to collapse
Thank you. I'll probably follow your firmware how-to once I can find a chunk of time to work on it. Why do you suppose the G930A and G930U are the same while the G930T is different? Maybe I bought the wrong one. I went with the G930T because I read a few places that it had the least bloatware.
From memory AT&T used to have their own specific branded model like T-mobile, but they eventually discontinued the G930A and just started offering the unbranded version.
Then I believe from that point onwards G930A's just got the G930U firmware updates. So they were once different but aren't any more.
G930U would have the least bloatware because it's the non carrier unbranded version of the phone, most people will flash it over their own phone to remove bloat. G930T may be the least bloated of carrier branded phones, but G930U is least bloated overall.
From a technical level the phones are all identical, it's just how the carrier has customised their firmware. You having the G930T isn't really a problem because you can just flash any other USA model firmware and get the same experience as if you bought it from them branded as theirs.
I flashed a SM-G930U firmware (SM-G930U_2_20181023083753_yako40hi3m_fac.zip) using Odin3 v3.13. That got rid of the T-Mobile bloatware, which is nice, but I still have the same signal problems I had before. Any other ideas? I wonder if this model has an antenna or some other piece of hardware that limits the frequency bands. I very briefly saw Network Cell Info Lite pick up a signal on Band 30, which I had never seen before. Maybe I'll see more of that if I get a chance to take the phone farther from home.