Develop Bugs

GSM Frequency Change, dual-band to quad or tri-band

Greetings, can anyone please tell me if there is any way to get my T-mobile device to recognize other GSM frequencies? It is currently a dual-band pocket pc device and I would like to make it such that it recognizes the 850 Cyngular frequency in the US. In other words, how can I make my dual-band device a quad or tri-band device?

ksymeonides said:
Greetings, can anyone please tell me if there is any way to get my T-mobile device to recognize other GSM frequencies? It is currently a dual-band pocket pc device and I would like to make it such that it recognizes the 850 Cyngular frequency in the US. In other words, how can I make my dual-band device a quad or tri-band device?
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Hmm. i would say only by soldering. It's a hardware limitation of the device...
Stefan

The MDA/XDA II device is already tri-band.
or did I missunderstand you?
greets Alex

alexball said:
The MDA/XDA II device is already tri-band
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That's right. But the MDA/XDA I is only a dual band phone.....
Stefan

Yeah, my device is only dual band. I thought that perhaps all these devices initially had the potential or ability to pick up any signal but that it was a software issue to actually start doing so. I am not too good with the techy lingo, but is there something called "soft phone"? I can't imagine companies manufacturing very similar phones overseas and in the US and the only difference being that one is dual band and the other tri band. It makes sense that these devices are all quad band and the company places limitations on them depending on where they are purchased

no the HF VHF and UHF and so forth need a frontend which cant just be programmed like that it have to do with filters and such as in before the signal ever get close to being digital and programmable

GSM BAND SWITCHING SOFTWARE
DOES ANY ONE KNOW WHERE CAN I GET A HOLD OF THIS? THANKS

hi Rudegar
can you shed a little more light on the filters and hardware change that would be required to change a frequency or activate another if the chip has it. ( sometimes it is capable but not activated )

[Q] P601 & P605 mix ?!?

Hi guys,
I just opened my P601 (it called P602 in Turkey where i bought and it is WIFI+3G, not LTE model) inside to check about battery problem and i discovered something else that its sim card slot / board is written P605 on it !!!
You can see the attached pics, that i indicated P602 and P605 writings.
So what do you think ? Is my tablet P601 or P605 ?
(INFO: In Turkey there is no LTE connection yet, but it is on the way.So i thought that it can be actually P605 and they downgrade it by some software or something else to block LTE or keep it around 3G.If it is like that, is it possible to turn it back to P605 again ?
Need your knowledges,infos,opinions, anything you got Thanks

KpttpK said:
So i thought that it can be actually P605 and they downgrade it by some software or something else to block LTE or keep it around 3G.If it is like that, is it possible to turn it back to P605 again ?
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In short, no.
SM-P600 - wifi only
SM-P601 - 3G
SM-P602 - 3G
SM-P605 - 4G
SM-P607 - 4G
The P600/P601/P602 all share the same processor (Samsung's Exynos 5420), while the P605/P607 uses a different processor (Qualcomm's Snapdragon 800). The 4G LTE modem is actually a part of the Snapdragon processor. If your device doesn't have a Snapdragon processor (and you can use some sort of hardware information app to verify), then you don't have 4G LTE capability. Period.
Certain pieces of hardware/connectors relating to sim cards/network connectivity in general might be shared between the 601/602/605/607. But one of the circuit boards in your device is clearly labelled as for the SM-P601 (which I believe is identical to the 602 in terms of hardware, so Samsung probably doesn't even bother differentiating).

Thanks a lot
I downloaded a program from google play and find out that it is actually Exynos.Well my hopes fell into the water but, it's better than ignorance :good:

Galaxy S20+ SM G986N

Hello to all,
i recently bought the Galaxy S20+ G986N, mine is a korean version!
Now I accidentally read that the 3G/4G and 5G networks are limited! --> I did not know before!
Is it possible to unlock the networks?
Thanks in advance and regards
Daniel
PS:
Is it possible to unlock the Dual Sim version here? Since this is a SingleSim!

Allegedly yes if you bought the phone sans mobile network, pop you sim inside and talk to someone for 10 minutes, on your local network that is, it should reset to a "domestic" flavor of networks... it can be checked via the secret menu *#60# or something like that (google is your friend if not), dough snapdragon has no issue whatsoever with working on any network, the network locked ones and usa specific ones are a different thing, - even those can be made to work.
I was not aware any of the s10 and s20 series come with just a single sim as one slot can be used for sdcard and a sim... Give it a shot, you already bought the phone anyways...

I also just mean the 5g net. I guess only the Sub6 n78 is activated here. The mmwave not at all!
The question is, does it have a software or hardware limitation? If software, which one can I install via odin?

danikristijan said:
I also just mean the 5g net. I guess only the Sub6 n78 is activated here. The mmwave not at all!
The question is, does it have a software or hardware limitation? If software, which one can I install via odin?
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In fact 5G limited not only by software, but by hardware too, every band protocol of 5G requires appropriate specific antenna to be installed in your device. Moreover, you can't flash anything except the firmware designed for N version (no U/U1 whatsoever options) because of boot-loader.

Thanks for your reply.
For mmwave you need hardware, but I guess for Sub6 it's only limited by sw?!?

5g supported bands are limited by hardware.
Korean models only support 5G n78.
Hope this helps

nguyenlucky said:
5g supported bands are limited by hardware.
Korean models only support 5G n78.
Hope this helps
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Many thanks. Of course it helps...is there's a possibility to unlock the other frequencies which aren't limited by hardware?

danikristijan said:
Many thanks. Of course it helps...is there's a possibility to unlock the other frequencies which aren't limited by hardware?
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It's possible (4G bands) on some old phones (pre-835 era), but not so much these days though

Thanks for your reply. Not so much means, currently no possibility?

SM-G988N CSC bypass for UK location?

Hi everyone,
I got a S20 Ultra (Korean version) as it was one of the few with Snapdragon to work on UK bands but I am struggling to trick the phone to show me content in english on native apps (Samsung Daily, Weather, Members app...).
Don't get me wrong, the initial content is in english but once you try and get more info, about the weather for example, it takes me to a korean website. Members is in Korean all around and daily has Korean cards inside.
Which I think is normal due to the Korean CSC.
I changed the CSC from SKT to KOO but it only removed the network branding and default carrier apps.
Is there a way to bypass the CSC or install an English CSC from UK for example?

did you find how to change it ?

Also have the same issue. I am in Australia. I was thinking about installing australian firmware?

I have an SM-G9860, which is the Hong Kong S20+, and live in Romania. Anyway, I'm pretty much in the same boat as you, having the TGY csc instead of ROM or ORO. Samsung Weather sends me to samsung internet to accuweather.com, which is just what my old exynos s10+ would do, and samsung daily seems about normal, with only the spotify recommendations card showing something in chinese. On the other hand, Samsung Members, which had been acting like I was living in Hong Kong (showing me the offers from there and so on), has, since a few days ago, started showing me content from Romania. Upon randomly launching it last week, it gave me a message as such: "App might reset due to regional settings change" or something like that. My csc is still TGY and samsung pay for instance still is the hk variant. Other than that everything is pretty normal.

Thats why I was asking if its possible to dowbload firmware for the Australian version of the S20 Ultra which is not snapdragon (the reason I bought Korean version because it is snapdragon). Will things still function as normal if I put on Australian firmware that is designed for a korean phone? Sammobile has the firmware for all countries spec phones.

simonriadis said:
Thats why I was asking if its possible to dowbload firmware for the Australian version of the S20 Ultra which is not snapdragon (the reason I bought Korean version because it is snapdragon). Will things still function as normal if I put on Australian firmware that is designed for a korean phone? Sammobile has the firmware for all countries spec phones.
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No. Quite simply put: You can only flash Firmware intended for that specific handset.
For example: I own the SM-G9880, which is the (snapdragon 865) Asian version of the S20 Ultra 5G.
I can only flash three firmwares: TGY (Hongkong), BRI (Taiwan) and CHC (China "open"). NO other firmware. Certainly not, say, the EU Firmware, which is for another CPU entirely (Exynos 990)

Roman9814 said:
No. Quite simply put: You can only flash Firmware intended for that specific handset.
For example: I own the SM-G9880, which is the (snapdragon 865) Asian version of the S20 Ultra 5G.
I can only flash three firmwares: TGY (Hongkong), BRI (Taiwan) and CHC (China "open"). NO other firmware. Certainly not, say, the EU Firmware, which is for another CPU entirely (Exynos 990)
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Thanks Roman. For example I cant use Samsung Pay because it says 'cards must be from Korea'. And a few other things of that nature.
Firmware of a US s20 Ultra running Snapdragon chipset wouldn't work either?

simonriadis said:
Thanks Roman. For example I cant use Samsung Pay because it says 'cards must be from Korea'. And a few other things of that nature.
Firmware of a US s20 Ultra running Snapdragon chipset wouldn't work either?
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Click to collapse
The same way I can't use it because I'd need a card from Hong Kong, but I just use GPay instead, works like a charm. Nope, nothing, I'm afraid. You can only flash the Firmware intended for that specific model number. I am in a slightly different conundrum - I got the SM-G9880, and I'm using it in Europe. While LTE and 5G bands are similar, they aren't identical. LTE, it's barely noticeable, since 1,3,7 and multiple others are supported, 1,3 and 7 work in 4x4 MIMO and the most important Carrier Aggregation Combos like 7-3-3-1 (12) work too. Only thing I don't have is CA with Band 20 (only supported in single mode) and on the LTE side that's basically it - I even have 28-7-3-1. However, 5G wise, different story. Only Bands I got for the EU are N1 and N78, which luckily is exactly what my carrier uses, but there might be N3 and N28 down the road like in other EU countries so it'd be nice to have that...

Roman9814 said:
The same way I can't use it because I'd need a card from Hong Kong, but I just use GPay instead, works like a charm. Nope, nothing, I'm afraid. You can only flash the Firmware intended for that specific model number. I am in a slightly different conundrum - I got the SM-G9880, and I'm using it in Europe. While LTE and 5G bands are similar, they aren't identical. LTE, it's barely noticeable, since 1,3,7 and multiple others are supported, 1,3 and 7 work in 4x4 MIMO and the most important Carrier Aggregation Combos like 7-3-3-1 (12) work too. Only thing I don't have is CA with Band 20 (only supported in single mode) and on the LTE side that's basically it - I even have 28-7-3-1. However, 5G wise, different story. Only Bands I got for the EU are N1 and N78, which luckily is exactly what my carrier uses, but there might be N3 and N28 down the road like in other EU countries so it'd be nice to have that...
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no .. sorry ..
i still think its only the CSC ..
if i know how to modify the CSC_OMC_OKR_G988NOKR1BTI3_CL19654513_QB34370104_REV00_user_low_ship_MULTI_CERT.tar ....
like i can see carriers/KTC and only Korea ...
i just don't know how to modify the file like how to unpack and repack so i can flash it i search for a guide but nothing on google or here in XDA

Do the GT-i9195L or GT-i9195T work on American LTE bands?

With 3g being phased out in 2022 I need to move on from my S2. The S4 mini is a great option for me because of its small size, and these models have NFC, but I'm having trouble deciphering the frequency compatibility with American 4g LTE bands.
willmyphonework.net has info on the i9195L, the good news being it works , but the bad news is the i9195L is a lot harder to get a hold of for me (I don't speak Spanish)... and this site has no info on the i9195T.
Although, I found this fcc document on it: https://fccid.io/A3LGTI9195T/RF-Exposure-Info/RF-Exposure-Info-2032505 but I really don't have the expertise to decipher these numbers... It'd be nice for someone with experience to help me out .