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Hey guys,
I'm really interested in picking up a 4c, and would be even more inclined to do so if LTE bands can be unlocked (Ideally bands 2, 4 and 12).
This has been done successfully in the past on Xiaomi devices (specifically the Mi Note Pro with the Snapdragon 810). Since the 808 shares a very similar architecture to the 810, I'm hoping it can be done on the 4c successfully.
Here are some resources and guides to start with:
http://forum.xda-developers.com/redmi-note/general/unlock-lte-bands-step-step-xiaomi-mi-t3084774
http://en.miui.com/thread-154862-1-1.html
http://forum.xda-developers.com/mi-...how-to-unlock-lte-frequency-bands-mi-t3215880
http://forum.xda-developers.com/oneplus-one/general/guide-unlock-aditional-bands-qualcomm-t2877031
http://www.xda-developers.com/remove-band-restrictions-qualcomm/
Hopefully someone with a Mi 4c is able to try and confirm their success!
That's very interesting! I wish also band 20 (800 MHz) could be unlocked since it's largely used in Europe.
Mee too interested to unlock (if possibile) 800 mhz
One more interested in the 800. :good:
B4 (AWS)
Im up for B4 (AWS) :good:
doesn't have it unlocked but it seems it makes really no difference. Don't trust the few articles from people who did not even test...
I have LTE bands everywhere (work, home, way between) and I live in a zone where it is kinda hard to get...
exploreresp said:
doesn't have it unlocked but it seems it makes really no difference. Don't trust the few articles from people who did not even test...
I have LTE bands everywhere (work, home, way between) and I live in a zone where it is kinda hard to get...
Click to expand...
Click to collapse
It depends a lot on what network you're on. The LTE bands that come enabled by default on the 4C don't support any US networks.
800 mhz (band 20) would be great
What LTE bands does mi4c support?
Does anyone know what LTE Bands the Xiaomi mi4c supports out of the box?
Been struggling to find a reliable source/list
boonkoh said:
Does anyone know what LTE Bands the Xiaomi mi4c supports out of the box?
Been struggling to find a reliable source/list
Click to expand...
Click to collapse
2G GSM 850/900/1800/1900MHz; CDMA BC0/BC1
3G WCDMA 850/900/1900/2100MHz; CDMA BC0/BC1
4G FDD-LTE: 1800/2100/2600MHz; TDD-LTE: Bands 38(TD 2600) / 39(TD 1900) / 40(TD 2300) / 41(TD 2500)
800MHz?
Hi,
Bought mi4c to find out that I can't get LTE working in my village
I live 12kilometers from a bigger city. There is LTE available in my village but I think they operate on 800MHz and in city at 1,6GHz.
I dreamed about using my new 4g connection here after 3years with Galaxy S3
I have to try these guides. Thank you for providing them.
Regards,
Noboby tried to unluck bands?
Wouldn't advise in case it bricks the phone. If there is a way to unbrick, then go for it it
ermacwins said:
Wouldn't advise in case it bricks the phone. If there is a way to unbrick, then go for it it
Click to expand...
Click to collapse
In Snapdragon phones there is always a way to unbrick but it could be very frustrating and time intense
I have tested it on many of my snapdragon phones.
On some phones, it works flawlessly. On other, the signal strength is weaken but works nevertheless. However, some phones especially carrier ones have anti tampering mechanism which reverts the value back to original after restart. However, usually this is solved by a custom kernel and custom rom but then again, it gets really tough to get into diag mode in custom modes.
Never had any problems.
But you MUST backup your EFS partition via recovery or using QPST / QXDM else you would have a lot of problems if you messed up the values like no signals or broken wifi or sensors etc. and SAVE them on your phone as well as on your PC. (at least two backups)
As long as you take the above two precautions, you will never mess up your phone!
Its supports LTE band 3 and 7 which is mostly used in europe, middle east and asia. However even after you select "Prefer LTE" from the setting it might not connect.
You can try this (this will change on reboot so will try to see if i can change within the code):
1. Enter *#*#4636#*#* in the diapad.
2. Select phone information 1 (there are two sims so select the first one)
3. Change to LTE/WCDMA (if it doesn't connect to LTE then try "LTE only" and then change it to LTE/WCMDA)
If the above doesn't connect to LTE then your carrier is offering LTE at a different frequency.
For me atleast the default APN were wrong, so i had to manually change the APN restart and then do the dialer thing.
regspy said:
3. Change to LTE/WCDMA (if it doesn't connect to LTE then try "LTE only" and then change it to LTE/WCMDA)
Click to expand...
Click to collapse
There is NO LTE/WCDMA option only. Please see screenshot and point out what option I'm supposed to pick
screen shot of "phone information 1" --> http://imgur.com/BELHKaO
Which one of those am I supposed to tap on?
I picked "TD-SCDMA, WCDMA and LTE" but that broke network connectivity.
EDIT: Please also take a look at this: http://imgur.com/gallery/yzIHD49
I am currently connected to "3 ITA 3G" and would like to connect to "3 ITA 4G" but tapping on that makes a pop up appear "Registered on network". However no 4G appears in the bar on top. It remains stuck in 3G or H+.
3 ITA doesn't have LTE on band 20 [8oo Mhz LTE].
So why aren't I picking up 4G?
@AndrewIT im not in italy, however from Wiki it seems your carrier supports 4G on band 3 (1800).
select the "3 ITA 4G", then follow my steps. You have to scroll up that list in screenshot http://imgur.com/BELHKaO and you'll see "LTE only" and "LTE/WCDMA" option.
regspy said:
@AndrewIT im not in italy, however from Wiki it seems your carrier supports 4G on band 3 (1800).
select the "3 ITA 4G", then follow my steps. You have to scroll up that list in screenshot http://imgur.com/BELHKaO and you'll see "LTE only" and "LTE/WCDMA" option.
Click to expand...
Click to collapse
Thank you! I was finally able to see the 4G icon on my Mi4c.
Entered *#*#4636#*#* in the diapad.
Selected phone information 1 (there are two sims so select the first one)
I scrolled up [see screenshot] and set WCDMA and LTE from the list.
Screenshot: http://imgur.com/OJ98uQi
You can see that I successfully picked up 4G signal, but it was extremely poor, only one bar standing close to a window.
As I move inside the house it loses 4G and gets back to 3G or H+.
It seems that I'm way too far from the LTE antenna to get a good 4G signal.
Guys I am kinda lost here, so is there a good chance that it supports especially 800Mhz band or not ? And when I am here, is there hardware difference between TDD-LTE and FDD-LTE version? How do I find out which one I have ?
I am leaving the post paid cell service and going prepaid.
I since majority if prepaid US prepaid carriers are Sprint, T-Mobile and some AT&T. I want a GS 7 that will support all three carriers with as much bands possible.
Any suggestions for carrier versions or does the Sprint version support (once unlocked) support AT&T and T-Mobile.
There's only 1 model variant in the US now - they all have the same band support - it all depends on firmware as to what bands are active.
But one thing to consider is that while a Verizon/Sprint phone may work on Tmobile/AT&T the same might not be the case the other way around because the AT&T/Tmo phone will probably have the bands disabled in the FW
Just to show this is my tmobile S7, wcdma bands that are enabled - so seems it would support Verizon/Sprint on bands 800/850/1900/2100 -- 2100 is a band not listed on Phonescoop FYI
nest75068 said:
just to show this is my tmobile s7, wcdma bands that are enabled - so seems it would support verizon/sprint on bands 800/850/1900/2100 -- 2100 is a band not listed on phonescoop fyi
Click to expand...
Click to collapse
wcdma ≠ cdma
unknownbeing said:
wcdma ≠ cdma
Click to expand...
Click to collapse
Guess we'll have to wait until a Sprint/Verizon person gets their phones and get into the service menu to see what it looks like
Wasn't sure if they were the same thing (left Sprint well over a decade ago for GSM and never looked back lol)
But based on your info, then my first comment is probably true - Tmo/AT&T variants will not work on Sprint/Verizon due to not having the proper FW
nest75068 said:
Just to show this is my tmobile S7, wcdma bands that are enabled - so seems it would support Verizon/Sprint on bands 800/850/1900/2100 -- 2100 is a band not listed on Phonescoop FYI
Click to expand...
Click to collapse
Is there a way to set preferred lte band like the s6?
PunishedSnake said:
Is there a way to set preferred lte band like the s6?
Click to expand...
Click to collapse
I haven't tried yet. Don't want to mess something up
nest75068 said:
There's only 1 model variant in the US now - they all have the same band support - it all depends on firmware as to what bands are active.
But one thing to consider is that while a Verizon/Sprint phone may work on Tmobile/AT&T the same might not be the case the other way around because the AT&T/Tmo phone will probably have the bands disabled in the FW
Click to expand...
Click to collapse
Is this right? The FCC filing shows 5 models (SM-G930V [Verizon], SM-G930P [Sprint], SM-G930R4, SM-G930A [ATT], SM-G930T [T-Mobile]). It shows each version having support for different bands.
How would one go about changing the firmware? For instance, if I have the VZW version (doesn't support LTE Band 12) and want to use it on T-Mobile, how would I change the firmware to T-Mobile's?
S7/S7 Edge FCC Filing Showing LTE Support
jblazea50 said:
Is this right? The FCC filing shows 5 models (SM-G930V [Verizon], SM-G930P [Sprint], SM-G930R4, SM-G930A [ATT], SM-G930T [T-Mobile]). It shows each version having support for different bands.
How would one go about changing the firmware? For instance, if I have the VZW version (doesn't support LTE Band 12) and want to use it on T-Mobile, how would I change the firmware to T-Mobile's?
S7/S7 Edge FCC Filing Showing LTE Support
Click to expand...
Click to collapse
As for FW change, not sure how that would go. We shall see what happens when the Dev's get their hands on these and start to figure it out.
nest75068 said:
As for FW change, not sure how that would go. We shall see what happens when the Dev's get their hands on these and start to figure it out.
Click to expand...
Click to collapse
Has that been ever done successfully on any of the carrier devices? You couldn't do that on the S6 to enable certain bands. I'm not too familiar with the other devices.
jblazea50 said:
Has that been ever done successfully on any of the carrier devices? You couldn't do that on the S6 to enable certain bands. I'm not too familiar with the other devices.
Click to expand...
Click to collapse
Well looking at Phonescoop, the S6 had separate CDMA and GSM models. Based on my understanding of the S7, there is 1 phone for the US market (where each carrier has their own model #) but internally the phone is the same.
The only other phone I can think of that had 1 variant for the US market was the iPhone (where each phone internally was the same and the bands that were active was dependent on the FW)
nest75068 said:
Well looking at Phonescoop, the S6 had separate CDMA and GSM models. Based on my understanding of the S7, there is 1 phone for the US market (where each carrier has their own model #) but internally the phone is the same.
The only other phone I can think of that had 1 variant for the US market was the iPhone (where each phone internally was the same and the bands that were active was dependent on the FW)
Click to expand...
Click to collapse
I think on the S5 you could change some of the NV to enable different bands. The iPhones are all one variant and they don't disable certain bands either. I have a 6S+ on T-Mobile (supports all bands); if I swap the sim for Verizon, it'll work on all of Verizon's lte bands as well. The S7 for verizon shows support for bands 2/4/5/13 so I'm not sure if I were to place a T-Mobile sim that it'll enable band 12 since it's not enabled on Verizon's version.
I guess we'll have to wait and see if it's truly one variant of the S7 in the US.
I'm in the UK, I'm wanting the S7 Edge - but don't want the 8890. The screengrab shows it supporting the main UK bands too.. Hm! Can you get simfree phones in US?
PunishedSnake said:
Is there a way to set preferred lte band like the s6?
Click to expand...
Click to collapse
Figured out on the Tmobile variant how to set preferred band.
For me Band 12 is great for calls/texts in my building but HORRIBLE for data so I always switch to Band 4 as my only lte band (which means I don't get calls since I have VoLTE off but no biggie).
To do this on the S7 requires a few more steps than the S6, you have to
*#2263# for service menu
Select clear all bands
Then select LTE band preferences and choose the band you want
Then hit the more button(top right hand corner) and select back
Then hit Apply band band configuration
To revert back to normal go back into the service menu and choose select all bands and then choose apply band configuration
nest75068 said:
Figured out on the Tmobile variant how to set preferred band.
For me Band 12 is great for calls/texts in my building but HORRIBLE for data so I always switch to Band 4 as my only lte band (which means I don't get calls since I have VoLTE off but no biggie).
To do this on the S7 requires a few more steps than the S6, you have to
*#2263# for service menu
Select clear all bands
Then select LTE band preferences and choose the band you want
Then hit the more button(top right hand corner) and select back
Then hit Apply band band configuration
To revert back to normal go back into the service menu and choose select all bands and then choose apply band configuration
Click to expand...
Click to collapse
I just want band 4 to be the preferred one instead of b12
PunishedSnake said:
I just want band 4 to be the preferred one instead of b12
Click to expand...
Click to collapse
Well another thing you can do is go in and specifically turn band 12 off only and will still net you calls and whatnot
nufclad said:
I'm in the UK, I'm wanting the S7 Edge - but don't want the 8890. The screengrab shows it supporting the main UK bands too.. Hm! Can you get simfree phones in US?
Click to expand...
Click to collapse
We normally can purchase phones outright but they are usually branded by their carrier. AFAIK, there wont be a unbranded version in the US. However, isnt the S7 doing something with the phone locking to the first sim/carrier being placed in the phone?
i have a g930t that is working with a Verizon sim card in it . and this is what i did
1: i used the sim unlock app on the s7 tmobile to unlock my phone
2: then flash g930u firmeware
3: i dont know if this one helped or not but i did *#2263# to slect all the bands.
4: turned off the phone
5ut the verizon sim card and turned it on
6: after it finished booting up the phone you will see a message on the screen that will say something like" need to reboot to configurate your sim card" hit ok and let it reboot.
enjoy
Can one use a G930P (Sprint S7) on T-Mobile USA with full band usage? I am assuming the phone would need to have a custom ROM on it.
Hello,
I have a Samsung Galaxy J2 SM-J200F LTE, I usually just get 3G or H+ and I want to get an option to force LTE only.
I did the *#0011# it shows me the service menu :
1- I click the "Plus" button on top-right.
2- I click "Back".
3- Then input "Q".
4- Then "Back" again.
5- Finally input "0000".
I waited for 5 minutes, nothing happened. I repeated the process many times, but still I can't get to the options to choose "LTE only".
PS : I tried *#2263# too, but it shows nothing at all.
I even tried the app "4G LTE SWITCH" . But it says that my device is not compatible.
Please guys, help me.
Is it compatible with the carriers lte? Just because it says it has lte doesn't mean it will work on every carriers lte.
Also if all you are getting is 3g or lte then you may not be in lte coverage.
zelendel said:
Is it compatible with the carriers lte? Just because it says it has lte doesn't mean it will work on every carriers lte.
Also if all you are getting is 3g or lte then you may not be in lte coverage.
Click to expand...
Click to collapse
Yes, it is compatible with the carriers LTE bands, and there is a strong LTE coverage because I tested it in another phone having the same carrier too.
I just need a way to lock LTE only please
hunterwolves said:
Yes, it is compatible with the carriers LTE bands, and there is a strong LTE coverage because I tested it in another phone having the same carrier too.
I just need a way to lock LTE only please
Click to expand...
Click to collapse
You dont want that. As LTE is a data signal only. If it was only LTE you would never get a phone call or text.
If it is not connection the LTE then my next guess would be that the antenna is not strong enough.
Remember not all devices are equal. Just because one works doesnt mean others will.
zelendel said:
You dont want that. As LTE is a data signal only. If it was only LTE you would never get a phone call or text.
If it is not connection the LTE then my next guess would be that the antenna is not strong enough.
Remember not all devices are equal. Just because one works doesnt mean others will.
Click to expand...
Click to collapse
In fact I don't want to use the phone for calls, I just need to activate LTE only please.
hunterwolves said:
In fact I don't want to use the phone for calls, I just need to activate LTE only please.
Click to expand...
Click to collapse
Then you will have to build your own rom. Which still might not happen as the part that controls that is not open source. So it will take alot of work. And with that device you will most likely not be able to do anything about it as it is not modable and there is no device that even has the option for you to compare the code.
This is just something you may not be able to do
He wanted to enable LTE only mode. . .so there's a way you need to modify CSC features. .I tried this a year ago. . it's still working
Buy xiome Redmi 2 and above phones u can force lte stand by mode also higher version like Redmi 4 has dual sim supporting dual lte stand by mode.
Xiomi offers awesome features at lower costs...
Lte only mode on samsung devices(Tutorial )
Here is the link to the video tutorial. ..??
https://youtu.be/ojWF6lA1QGY
Hola,
Long time browser and piddler.
I am trying to figure out at the system level where the cellar frequency band selection are manipulated. I want to attempt to be able to lock in specific frequency bands without constantly fiddling with the testing menu which is limited and not specific. ie when I select gsm only to stay in band 5, the system will still swap back over to band 13 if there is little data demand.
Totally not an advanced developer but have been messing with Android since the G1 and first rooted an HTC thunderbolt.
Thanks y'all! Love this community!
Running the pixel XL rooted oreo now with provisioning disabled.
Also some amplifying information - Band 5 gives me 16megs bandwidth and band 13 only gives me 1meg. When using the engineering test mode it gives me the band protocalls to select from but not a specific frequency band for example I can select WCDMA, GSM Only, UMTS...and band mode only allows for Auto, USA, PCS, 800... I can get my phone to sometimes shift from 13 to 5 if I select GSM only and put band selection mode into Cellular 800, but it is very short lived. At first I thought it was related to bandwidth demand that would keep it in band 5 but that has not been the case consistently enough to come to that conclusion at this point.
I am getting a consistent -78 to -87dBm signal strength for any band that my phone is locked into. I really am looking for how and in what parameters the phone is using to select the band it utilizes, and its likely not the available bandwidth since I know for a fact when I am on band 5 I am way better off speed wise and even my ping is better...
Also when locked into band 5 my RSSNR and RSRQ are significantly better than when I'mm on band 13
Again, thank you all for the spectacular community and information. I truly appreciate the time so many users her are willing to invest in helping eachother.
Need to switch to different bands anyone with working methods?
Wouldn't mind finding a way to turn off some bands muself. AT&T has grown fond of band 30.
I drive truck otr and use a signal booster and 30 and a few others are not covered using it.
ServiceModeRIL can do this. I keep band 13 turned off in my city because Verizon sucks and packs everyone on there so speeds, latency and signal quality are crap.
Who is your carrier? Are you rooted? If rooted then this is easy. If not it's still possible but it can depend on your carrier.
partcyborg said:
ServiceModeRIL can do this. I keep band 13 turned off in my city because Verizon sucks and packs everyone on there so speeds, latency and signal quality are crap.
Who is your carrier? Are you rooted? If rooted then this is easy. If not it's still possible but it can depend on your carrier.
Click to expand...
Click to collapse
Where can I find that?
anewday said:
Where can I find that?
Click to expand...
Click to collapse
Firstly, if you're unrooted and on Exynos (G955F/G955FD), you're out of luck. The code is *#2683662#, however ever since the July update, all builds newer than that have that code disabled so you can't access ServiceMode through that anymore.
If you're rooted and on Exynos, you can use the 'Phone Info Samsung' app to launch either the 2683662 menu or the 2263 menu using root, both will allow you to select and change specific GSM, WCDMA and LTE bands.
If you're on Snapdragon (955U/955U1), you can try either *#2683662# or *#2263#, one or both should work.
Service mode code works on my Galaxy A50 exynos (Sprint) but nothing shows. It's blank.
I can't root this phone since it's not available for it.
Is there a way to unhide the options in service mode?
Use QuickShortcutMaker from Play Store to change or lock Band on both rooted and unroot samsung phones with Exynos processor.