{Trick} Get Around "RAT SELECTION RESTRICTED" on i897 modems! - Captivate Android Development

First off i need to thank Xda user KevL for putting me on the first step in the right direction to getting here! Thanks!!!
For any one using and running i897 modem for the love of audience chip support on their device and also need band selection to lock 850 band, this thread is for you!!!
I first started using i9000 modem kernal combos just for the band selection ability.
After AdamHolden85 Allowed me to continue development on his KB1 Fusion rom i started a mission to unlock the "Rat". I gathered much information from users that suffered from "Rat". (weird that some users with i897 modems installed don't have this restriction, but most do)
Some may ask "What is "Rat"?"
dial *#2263# on your captivate while running a i897 modem and you get:
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
but what you are after is:
So lets get to it shall we!
This is really more of a security loop hole!!
1=Remove the simcard from your phone with out removing battery!
(use your nail to lift the edge of the card over the battery lip)
2=dial *#2263# and you will first get "RAT", wait for this pop up!
3=hit "OK" and dial *#2263#, and now you are in!!
4=select the bands you wish to use
5=Menu hard key to get popup here and select end!
6=place device into airplane mode!!
7=reinsert your sim with out removing battery!!
8=Turn off airplane mode and watch cell bars grow and data to connect in your status bar.
9=Dail in *#0011# and check for your self!!
May work on other band selection RAT modems, I only can confirm JH7,JH6,JI6,KB1,and KF1!

FAQ, at OP's request
FAQ​
1.
Does this mean UL/DL speeds can be improved on those listed modems?
Click to expand...
Click to collapse
and in response
Johnsondr80 said:
Not there yet. But they say 850 is faster due to less users clogging the line.
Click to expand...
Click to collapse
This does not effect data speeds because this has nothing to do with HSDPA/HSUPA/HSPA+. That is dependent on something written within the modem that XDA is yet to learn about. (no one seems to wanna touch the modems, in part because they are heavy with proprietary code for things like the bluetooth chip and the GPS chip. proprietary = closed source and a PITA to mod) Tho using GSM = 2G and WCDMA = 3G, so be careful about which 850 or 1900 band you are choosing.
2.
And the same bugs with using a I9000 kernal aply, no buetooth, is that corect?
Click to expand...
Click to collapse
This does not allow for mismatch with kernels, as that is HW communication dependent. Your kernel talking in a 1234 pattern and your modem talking in a 4321 has NOTHING to do with RAT or the band/frequency that your phone it trying to speak to the antenna with.
3.
I have tried this a couple times and it doesn't seem to work for me. RAT is still restricted at the main menu.
Click to expand...
Click to collapse
This does not remove RAT, it gives us a means to work around it. At this point we still don't even know what triggers RAT as some I897 users have shown to not have such restrictions. Until we have figured that out we can't kill RAT, tho we do know it is something within the I897 aka AT&T modems.
4.
I notice if I reboot my phone it sets back to 1900 again. I made sure to follow the steps correctly three times. Is this how it works?
Click to expand...
Click to collapse
and in response
Johnsondr80 said:
Most times it will stick past reboot.
Unless you visit recovery for some reason and then reboot from there.
Try a airplane toggle
I find that if I get back on 1900 for some reason. Airplane mode for a second and it goes back to 850.
Click to expand...
Click to collapse
Settings may get dropped on reboot, sry but for now this is only a change held in the RAM.
Other things to note:​
Phone stays on and running the whole time. The most time consuming part of this is waiting for the phone to realize the removal/insertion of the sim card.
-SGS Tools / nitrality- apps have the "secret/service codes" to speeds up and or ease the process.
No love for WCDMA 900... even on fully auto that lone band is unused.
Folks, follow the instructions exact, and take your time. I tried toying around and skipping = not successful.
Lastly you can't seem to force it to run an unsupported band (like I did with the WCDMA 900), it will eventually seek its way into service again. Keep in mind that having RAT means we have limited control over this aspect of the phone.
Also, LOL that I can force it to use GSM and only have edge data

Awesome !! And big thanks for this Johnsondr80 !! And a thanks to KevL also !!

Does this mean UL/DL speeds can be improved on those listed modems?

xpakage said:
Does this mean UL/DL speeds can be improved on those listed modems?
Click to expand...
Click to collapse
Not there yet. But they say 850 is faster due to less users clogging the line.
sign up for dropbox using this link to get 250mb free and help fusion at the same time.
http://db.tt/cCn3zrY
presented by Xdapremium app

Johnsondr80 said:
Not there yet. But they say 850 is faster due to less users clogging the line.
Click to expand...
Click to collapse
Also the 850 Band travels better so you'll see stronger signal more often. Should also give better call quality, tho I'm not 100% on that part.

I just wated to verify.....So there will still be no hspa with the i897 modems... And the same bugs with using a I9000 kernal aply, no buetooth, is that corect? This just alows band selection?
Sent from my GT-I9000 using XDA App

thumper_1151 said:
I just wated to verify.....So there will still be no hspa with the i897 modems... And the same bugs with using a I9000 kernal aply, no buetooth, is that corect? This just alows band selection?
Sent from my GT-I9000 using XDA App
Click to expand...
Click to collapse
Yep, I897 modem is still hsdpa only. Yep, does not add any new kernel compatibility. Yep, does allow for band selection (tho still not a easily as those without RAT)
So, it is mainly useful for devs / testers, and ppl who have dumb phones that love using 1900 band during heavy traffic and/or low signal.

DaNaRkI said:
Also the 850 Band travels better so you'll see stronger signal more often. Should also give better call quality, tho I'm not 100% on that part.
Click to expand...
Click to collapse
No, you are right.
It dose travel better and reach futher, with stronger.signal.
sign up for dropbox using this link to get 250mb free and help fusion at the same time.
http://db.tt/cCn3zrY
presented by Xdapremium app

I know you guys said this was for testing but I just tried this with the KF1 modem. So I left my self a voicemail, listened to the vm and wow the voice quality sounds really bad. Is anyone else having the same problem?

nappent said:
I know you guys said this was for testing but I just tried this with the KF1 modem. So I left my self a voicemail, listened to the vm and wow the voice quality sounds really bad. Is anyone else having the same problem?
Click to expand...
Click to collapse
You must have posted in wrong thread.
sign up for dropbox using this link to get 250mb free and help fusion at the same time.
http://db.tt/cCn3zrY
presented by Xdapremium app

I have tried this a couple times and it doesn't seem to work for me. RAT is still restricted at the main menu.

jack man said:
I have tried this a couple times and it doesn't seem to work for me. RAT is still restricted at the main menu.
Click to expand...
Click to collapse
This does not remove RAT. As Johnsondr sneaks in there "This is really more of a security loop hole!!" In that you can enter the menu with the sim card out and lock in the phone to use your band of choice. When you put the sim back in it stays locked in.
Annoying yes, but at least we now have a means of changing the band when service is generally crappy.

I notice if I reboot my phone it sets back to 1900 again. I made sure to follow the steps correctly three times. Is this how it works?
Cognition V1.0 KF1

phoenix2217 said:
I notice if I reboot my phone it sets back to 1900 again. I made sure to follow the steps correctly three times. Is this how it works?
Cognition V1.0 KF1
Click to expand...
Click to collapse
Most times it will stick past reboot.
Unless you visit recovery for some reason and then reboot from there.
Try a airplane toggle
I find that if I get back on 1900 for some reason. Airplane mode for a second and it goes back to 850.
Like Dan said earlier. This is not something we are supposed to have access to and are limited to the full effect of it.
sign up for dropbox using this link to get 250mb free and help fusion at the same time.
http://db.tt/cCn3zrY
presented by Xdapremium app

Johnsondr80 said:
You must have posted in wrong thread.
sign up for dropbox using this link to get 250mb free and help fusion at the same time.
http://db.tt/cCn3zrY
presented by Xdapremium app
Click to expand...
Click to collapse
I'm confused why do you think I posted in the wrong thread. I did your step to get audience chip support. Audience chip is suppose to offer better voice quality. Am I missing something?

did this a couple more times to make sure I went through the steps correctly and both times when going back to the menu to see what band it was on I watched it go from 850 back to 1900. This was without a reboot or any button pushes. I hope we can find something that will work consistantly.

This works, however, it does not stick on reboot.

nappent said:
I'm confused why do you think I posted in the wrong thread. I did your step to get audience chip support. Audience chip is suppose to offer better voice quality. Am I missing something?
Click to expand...
Click to collapse
My guess is that your on an I9000 rom and flashed a captivate modem. In which case audio quality will be ummm pretty much gone
Sent from my SGH-I897 using XDA Premium App

nappent said:
I'm confused why do you think I posted in the wrong thread. I did your step to get audience chip support. Audience chip is suppose to offer better voice quality. Am I missing something?
Click to expand...
Click to collapse
Maybe you miss read. There is nothing here to give audience chip support to those who don't already have it. OP mentions this is for ppl who choose an I897 modem+kernel so that they can use the Audience chip.

Related

Could someone give me some confirmed info?

I'm just curious as to what it is. I'd be really interested in an android tablet. I currently have an eris... which is pretty weak.
I've googled a lot but everything seems to be old or "rumored" so could someone help me out? I'd appreciate it.
What is it you want to know?
Sent from my HTC Desire
Specs, pricing, will it be google supported, full market place?
Oh and I'm also really curious to see if anyone has tried logmein to remote access their computers. I do it on my Eris but it's slow. I've seen it on the iPad and it's much better. How is it on the GTab?
Hungry Man said:
Specs, pricing, will it be google supported, full market place?
Click to expand...
Click to collapse
Pricing isn't announced yet in most of the world.
For every other piece of infromation, why not just, eh, check the official website? I mean, have you even looked at Samsung's website? It lists all the specs for the device and few other details.
tl;dr: Price - dunno, not announced
"with Google" -experience - yes, if you mean GMail, Market and stuff.
Full Marketplace - Yes, it's a full phone and has all the capabilities as such, even market.
ps. Aside from the larger (and different) display, the Tab is essentially a Galaxy S.
Perfect thanks.
Does it Have an FM Radio Chip on it?
AnttiV said:
tl;dr: Price - dunno, not announced
"with Google" -experience - yes, if you mean GMail, Market and stuff.
Full Marketplace -
Yes, it's a full phone
and has all the capabilities as such, even market.
.
Click to expand...
Click to collapse
sorry but just to clarify this is a full phone but in tablet format?
so the inbuilt cell is capable of making GSM calls the same as say an iphone, NOT just able to use 3g connectivity for web as say a iPad?
wonder why the camera spec is so lame?
adzman808 said:
sorry but just to clarify this is a full phone but in tablet format?
so the inbuilt cell is capable of making GSM calls the same as say an iphone, NOT just able to use 3g connectivity for web as say a iPad?
wonder why the camera spec is so lame?
Click to expand...
Click to collapse
YES.
I'm sorry if I YET AGAIN sound angry or frustrated, it's not specifically you.
But don't you people ever think of yourselves and either read the official site or google around before asking questions? Yes, it's a full GSM/GPRS/EDGE/UMTS phone. The official site lists all the bands the phone works on. (except I hear the USA version lacks the phone capabilities? but retains data/sms? I don't know.)
http://galaxytab.samsungmobile.com/
or head to http://www.samsung.com/ and navigate from there.
EDIT: Euro/FI version:
GSM&EDGE / 3G / CDMA / TD-SCDMA - 850 / 900 / 1800 / 1900 MHz
3G - 900 / 2100 MHz
GPRS - Yes
EDGE - Yes
3G - HSDPA 7,2 Mbps / HSUPA 5,76 Mbps
Mod EDIT:I'D APPRECIATE IF YOU LEAVE YOU FRUSTRATION SOMEWHERE ELSE AND GUIDE PEOPLE FOR ANY # OF QUERIES THEY PUT.STILL,IF YOU CAN'T GET OVER THAT,YOU MAY TRY REPORTING THE POSTS! JUST CLICK
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
ICON AND LIVE PEACEFULLY.i am here to take all the tensions..Now hope i don't sound rude!...for more on this,read the forum rules..
yes.... i hae got it on saturday and i have made GSM calls also...
GSM calls and 3g video calls are extra features compared to ipad which will need a seperate micro sim and 3g contract and pay extra
when at home i use wifi for the tab and while on long journeys , put my existing contract sim and use it and will not miss calls too , the display is just awesome and so smooth........
i dont need to take seperate contract for stupid things
AnttiV said:
(except I hear the USA version lacks the phone capabilities? but retains data/sms? I don't know.)
Click to expand...
Click to collapse
lol i didn't take that personally
i think you answer your own q there, when you make ref to different claims made in diff web sites, that no one seems to totally know the answer too!
thanks tho'
just the price & lame camera spec to get my head round !!
adzman808 said:
lol i didn't take that personally
i think you answer your own q there, when you make ref to different claims made in diff web sites, that no one seems to totally know the answer too!
thanks tho'
just the price & lame camera spec to get my head round !!
Click to expand...
Click to collapse
Ah, good. What I did mean about that was that the other specs are official, but that part I haven't read anywhere but "rumor" sites.
As of right now they make no note of voice calling on american advertising ... It will be in the hardware but not in the firmware (rom) but im sure If we got a copy of your guys roms (all other countries besides US..lol) we will have the voice feature.
no6969el said:
As of right now they make no note of voice calling on american advertising ... It will be in the hardware but not in the firmware (rom) but im sure If we got a copy of your guys roms (all other countries besides US..lol) we will have the voice feature.
Click to expand...
Click to collapse
I'm not really clued up on all this but wouldn't this be tied in with the hardware? And since the Tab has been announced in the states not having voice(and possibly sms) capabilities wouldn't that mean it was missing the hardware to do it?
If that isn't the case then it's awesome for the people in the states to potentially have that option

[ROM] [Froyo] Darky's Raw Steel Edition NOW V3.0 w/voodoo

New release coming very soon
new thread coming tonight
COMPLETELY redone
404
10 char
x2
like to try it, but alas.....no dice.
Sweet! I'll definitely watch this for feedback and then probably flash it later today. HSUPA is working for you? On the other roms in this forum with HSUPA I've had varied experiences. My upload speeds in particular were really inconsistent.
EDIT: Yeah, 404...I guess I won't be dl'ing it right now. Get that fixed, please? I'll put up a mirror if I have time.
It's um.... very grey
Dropbox link 404'd.
ya its still uploading..i literally just put it in there when i posted this..it should be done uploading soon
yep 404 'd... am looking foreward to trying this though
Must've finished uploading, because it's downloading just fine for me now!
ok its done and ready for upload..sorry about that wait. dropbox takes forever for me for some reason.
tried it already but without reoriented kernel. I thought that if this has the voodoo lagfix it won't work with reoriented as that one is not patched for ext3/4 (if someone knows something else please tell me).
it was pretty fast and the theme is pretty nice.one of the nicest i've used.
Sent from my GT-I9000 using Tapatalk
avgjoegeek said:
It's um.... very grey
Click to expand...
Click to collapse
i agree.. i think with a new background it will look pretty nice.
icezar1 said:
tried it already but without reoriented kernel. I thought that if this has the voodoo lagfix it won't work with reoriented as that one is not patched for ext3/4 (if someone knows something else please tell me).
it was pretty fast and the theme is pretty nice.one of the nicest i've used.
Sent from my GT-I9000 using Tapatalk
Click to expand...
Click to collapse
your right voodoo will not work with reorient. i didnt want to use the kernal that came with it because i didnt want it to cause any problems with buttons and recovery and all that. so with the reorient kernal everything works, can still get into recovery and download with regular button combo, but voodoo does not work yet until excaliberinhand puts it in his kernal
the usual....how is the bluetooth on this?
ok ill give it a try again
Sent from my GT-I9000 using Tapatalk
phlunkie said:
the usual....how is the bluetooth on this?
Click to expand...
Click to collapse
yes, please confirm, is Bluetooth 100% ?
And 850 band voice and data?
They never seen to quirk right in hsupa.
dont know since i dont use bluetooth at all. check the reorient kernal thread since that what you would be using. but i think this is the same kernal being used in dg's cog 8.1 and i think it said on his download page that this kernal does have some kind of problems with wired bluetooth controls.
A.VOID said:
And 850 band voice and data?
They never seen to quirk right in hsupa.
Click to expand...
Click to collapse
yes its the jpm modem which i have found to be the best out of all of them
i just checked and it has every gsm 850 900 dcs 1800 pcs 1900 wcdma 2100 1900 900 and wcdma 850 you have to dial *#2263# then select COMBI the put a check next to wcdma 850 then menu and back..this will enable the 1 band that is not by default all the rest are already enabled.
Any screenshots. that would be nice.

GPS data not working with LTE activated?

GPS data retrieval not working when LTE activated?
Noticed this when inside building and requesting GPS location.
Anybody else experiencing this problem?
Note: I also notice the GPS lock icon coming on every 15 minutes, searching for location for up to 2 minutes at a time. App info for this notification: system UI.
Not sure if serious
Daniel Dumile said:
Not sure if serious
Click to expand...
Click to collapse
??
Connect to LTE on ur Nexus 4 try it, my brother tried it on his Nexus 4, same issue.
Just to clarify this is "GSM/LTE", not "LTE only".
Rogers network/Canada
I was unable to place calls on "LTE only" (also not sure why)
Daniel Dumile said:
Not sure if serious
Click to expand...
Click to collapse
There's been some discussion in this thread about issues with LTE and GPS.
1) Turn off LTE
2) Leave LTE off
3) Stop obsessing with LTE
Seriously tho, why does everyone have a hardon for LTE?
Taijohnsen said:
1) Turn off LTE
2) Leave LTE off
3) Stop obsessing with LTE
Seriously tho, why does everyone have a hardon for LTE?
Click to expand...
Click to collapse
30-70mbps... Ask yourself why? It's literally light speed. I got 60-something Mbps down the other day.
I'm having the same issue. Gps locks on 3g just fine but doesn't seem get locked on 4g.
Yea really wishing somebody could find a fix to this.. There is an underlying reason
THE_KINGDOM said:
Yea really wishing somebody could find a fix to this.. There is an underlying reason
Click to expand...
Click to collapse
Its the same reason for why the other things in 4.2.2 don't work with the old radios, the device isn't supposed to have LTE, Google purposely broke things to stop you from using it.
thracemerin said:
Its the same reason for why the other things in 4.2.2 don't work with the old radios, the device isn't supposed to have LTE, Google purposely broke things to stop you from using it.
Click to expand...
Click to collapse
Bro sometimes u seem like a big advocate of restrictions.
There is always a fix especially in the developing world of Android, it's just nobody has bothered because many areas don't have LTE or because whoever is using a fix, didn't make it public. Period.
Who gives a **** what the phone is "supposed to have" what it does have is a band-4 LTE chip. PERIOD.
Hardware is hardware.
"Oh hey I have a lambo with 500hp which is governor at 120kmh max speed, because you're not supposed to drive over the speed limit." - I'm sorry but in this case people would remove the governor and drive faster.
THE_KINGDOM said:
Bro sometimes u seem like a big advocate of restrictions.
There is always a fix especially in the developing world of Android, it's just nobody has bothered because many areas don't have LTE or because whoever is using a fix, didn't make it public. Period.
Who gives a **** what the phone is "supposed to have" what it does have is a band-4 LTE chip. PERIOD.
Hardware is hardware.
"Oh hey I have a lambo with 500hp which is governor at 120kmh max speed, because you're not supposed to drive over the speed limit." - I'm sorry but in this case people would remove the governor and drive faster.
Click to expand...
Click to collapse
You're right, except that the problems are in closed source modules, if you want to try your hand at hex editing them and fixing the problems, go ahead, otherwise you should use the phone as it was designed or live with the problems that come with using it in a way it wasn't designed.

Unlock all bands/regions possible for Z3C *root required*

Original source: Unlock all bands of your Qualcomm device! Use your phone globally! No bs! - XDA Forums
I created this thread to confirm that the above procedure works on the (qualcomm based) Z3 compact D5803. Check what bands you phone allows (because it supports everything) by dialing *#*#4636#*#* > Phone information > Menu (top-right) - Select radio band
Before I had only USA band. After unlocking I had all available bands. It's just good to know there's a good chance my phone will work on any network.
I followed instructions from the OP (here) and a Z2/Z3 specific post. Both are required.
Z3 compact D5803 steps (tested)
No.1
Do a BEFORE screenshot by going to *#*#SERVICE#*#* > Service Info > Configuration
No.2
Go here http://forum.xda-developers.com/cros...ating-t2871269
Do steps 1-33, but skip step 3 and step 3.5
Pause....
No.3
Goto http://forum.xda-developers.com/show...&postcount=142
Do the steps found there
Open QXDM, go to Option -> Communication
In Target port, choose your phone com port and press OK
Now in View -> NV Browser
QXDM will open new window, in Category Filter choose LTE
Scroll to id 06828 and click on that, click read then in Input and Value change the value to "1904863" (The value of int' Z2 with LTE band 19,21 add)
Click "write" and do the step 34 on the guide till the end
Reboot the phone, and check 7378423 to see the band
Click to expand...
Click to collapse
FINISH
Click to expand...
Click to collapse
Alternatively, there's this blog post which describes the same procedure. The screenshots are helpful to look at before doing the whole thing by yourself. [Xperia Z2 D6503]プラスエリア化してみた。(LTE、3G) | THE BOOLEE STREET
I can't see the images...
The question is: regardless of what you read on your display, does this trick actually work?
Has someone who usually travels around the world, tested yet?
The main difference between D5803 and D5833 is about LTE bands and it's a hardware difference, which means that even if you cross-flash the basebands you can't get it work just because of the lack of the proper radio module
istux said:
I can't see the images...
The question is: regardless of what you read on your display, does this trick actually work?
Has someone who usually travels around the world, tested yet?
The main difference between D5803 and D5833 is about LTE bands and it's a hardware difference, which means that even if you cross-flash the basebands you can't get it work just because of the lack of the proper radio module
Click to expand...
Click to collapse
That's not entirely accurate. Many modern Qualcomm devices use the same or similar radio modules. The available LTE bands depends on region, country, certification, and blah blah blah. If you read the guides or search the forum you will find many people have enabled alternate LTE bands by modifying the NV part of the radio. Some bands may or may not work depending on if your network supports them and if the internal antennas can support them. For some reason Sony does pretty well with its antennas because a lot of our devices have 6-9 bands of LTE available where some manufacturers skimp out and only allow 3-4.
darksideauto said:
That's not entirely accurate. Many modern Qualcomm devices use the same or similar radio modules. The available LTE bands depends on region, country, certification, and blah blah blah. If you read the guides or search the forum you will find many people have enabled alternate LTE bands by modifying the NV part of the radio. Some bands may or may not work depending on if your network supports them and if the internal antennas can support them. For some reason Sony does pretty well with its antennas because a lot of our devices have 6-9 bands of LTE available where some manufacturers skimp out and only allow 3-4.
Click to expand...
Click to collapse
Quite interesting. I will take a look for sure then :cyclops:
great! I will take a look and see if my D5833 can add the additional band since the 5833 doesn't support T-mobile LTE. I tested it last week in Dallas, Texas with my Hong Kong D5833 as my previous Z1 did show LTE with the same T-mobile plan I am on.
Hi ,
I got a Z3 C D5833 and I need to unlock the LTE_BC4 band can anyone confirm if it's possible and works??
it would be awesome if someone can confirm this mod is working on this great device, we need a specific z3compact tutorial :'(
Hi guys!
I have the D5833 model and I'm trying to enable the band IV 1700 mhz for UTMS (I think is name as BC4). I followed that tutorial (the first one, not the specifical for Z27Z3) and it appears enabled on the service mode but it doesn't seems to work. Maybe it's just not hardware supported?
I would need to turn D5833 which support this: HSDPA 850 / 900 / 1900 / 2100 --> To this: HSDPA 850 / 900 / 1700 / 1900 / 2100 (which is the D5803 model). If anyone could just give me any hint on this it would be great. Thanks in advance!
Warning ⚠
Don't mess with the settings in Phone Information. A lot of people lost signal after changing the settings...
vikingsail said:
Warning
Don't mess with the settings in Phone Information. A lot of people lost signal after changing the settings...
Click to expand...
Click to collapse
But, isn't a Nandroid backup an insurance against that risk?
wind0zer said:
Original source: Unlock all bands of your Qualcomm device! Use your phone globally! No bs! - XDA Forums
I created this thread to confirm that the above procedure works on the (qualcomm based) Z3 compact D5803. Check what bands you phone allows (because it supports everything) by dialing *#*#4636#*#* > Phone information > Menu - Select radio band
Before I had only USA band. After unlocking I had all available bands. It's just good to know there's a good chance my phone will work on any network.
I followed instructions from the OP (here) and a Z2/Z3 specific post. Both are required.
Alternatively, there's this blog post which describes the same procedure. The screenshots are helpful to look at before doing the whole thing by yourself. [Xperia Z2 D6503]プラスエリア化してみた。(LTE、3G) | THE BOOLEE STREET
Dialing *#*#SERVICE#*#* > Service Info > Configuration...
Before
After
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Confirm! It also work on my D5833 I have added few more band including most TD-LTE bands (Tested also on my SO-02F...)
---------- Post added at 03:23 PM ---------- Previous post was at 03:17 PM ----------
Kapital1 said:
But, isn't a Nandroid backup an insurance against that risk?
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For newer sony xperia device, insurance against this specific mod is to flash the baseband from a matching ftf firmware...
Kapital1 said:
But, isn't a Nandroid backup an insurance against that risk?
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Exactly. That's what I did and how I recovered from the problem.
mikuru396 said:
Confirm! It also work on my D5833 I have added few more band including most TD-LTE bands (Tested also on my SO-02F...)
---------- Post added at 03:23 PM ---------- Previous post was at 03:17 PM ----------
For newer sony xperia device, insurance against this specific mod is to flash the baseband from a matching ftf firmware...
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Great Mikuru :good:. Would you care to describe the method for the Z3C ?
vikingsail said:
Exactly. That's what I did and how I recovered from the problem.
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Well, making a Nandroid backup before embarking on any of these projects can never be emphasized enough!
Kapital1 said:
Great Mikuru :good:. Would you care to describe the method for the Z3C ?
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I am gathering all materials and information (driver, software, steps) ...
Maybe I should start another new threat ?
Does anyone tested unlockind band 20 LTE in D5833 model? In my case it is in avaible bands after unlocking, but in fact it doesn't work((( I wonder if it possible at all.
mikuru396 said:
I am gathering all materials and information (driver, software, steps) ...
Maybe I should start another new threat ?
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Start a new thread or edit your first post, I guess it would be up to you. I would suggest you to explain how to unlock other bands (not only Japanese ones) if possible so it may be useful to a wider audience.
Anyhow, your effort would be greatly appreciated :fingers-crossed:
Just a quick question - not meaning to thread-jack
So, this really intrigues me as I'm wondering if this would make it so that our phones could work with Google Fi's new service?
Would it be possible, were the bands to be unlocked, for our phones to use Google's specially developed SIM?
this will work on xperia m2 d2306?
I doubt the Z3C can use Fi because it would need to support CDMA for voice calls on Sprint.
Also, I wonder if we are really unlocking the LTE bands. The Qualcomm Transceiver and Baseband may be able to support all the LTE bands but the amplifiers may not. Until we find out what amplifiers the Z3C is using, we're probably just spinning our wheels in the mud. I can't find any teardowns of the Z3C that look under the shielding, but a teardown of a Chinese Z3 shows that the amplifiers are all Skyworks ICs.
Is it possible to unlock and use LTE band 12 for the D5803 variant? I'm thinking about buying a Z3 compact to use on T-Mobile, and they're deploying a lot of band 12.

4G does not work after update to Pie

I upgraded to Pie via ota, but my 4G does not work after upgrading, only 2g and 3g. Any solution for this?
PauloWesley said:
I upgraded to Pie via ota, but my 4G does not work after upgrading, only 2g and 3g. Any solution for this?
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+1 it happened to me too, haven't found a solution yet...
Have you updated via the VPN method?
Sent from my Mi A1 using XDA Labs
TrueMS said:
Have you updated via the VPN method?
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Yes
Try to select from list 2G and see if the modem works. then try one of the options offered. So I managed to get 4G
I think the problem is with the modem they used in Android Pie: it supports only B1 (2100), B3 (1800+), B5 (850), B40 (TDD 2300) and B41 (TDD 2500).
So 4G is working but only in countries where this bands are used. In Italy for example we have band 3 in highways and cities, but in rural areas we use band 20 and it's gone
I hope that they can solve the problem with a new update.
PS: Don't try to flash 8.1 modem over Android Pie stock rom. It will cause system crashes and SIM card won't work anymore until a reflash of Pie modem.
TrueMS said:
Have you updated via the VPN method?
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I did also
goran60 said:
Try to select from list 2G and see if the modem works. then try one of the options offered. So I managed to get 4G
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Can you please elaborate?
Updated using VPN method and i got no problems with signal. 4G works great like in Oreo. (Im from Portugal)
jack_21 said:
I think the problem is with the modem they used in Android Pie: it supports only B1 (2100), B3 (1800+), B5 (850), B40 (TDD 2300) and B41 (TDD 2500).
So 4G is working but only in countries where this bands are used. In Italy for example we have band 3 in highways and cities, but in rural areas we use band 20 and it's gone
I hope that they can solve the problem with a new update.
PS: Don't try to flash 8.1 modem over Android Pie stock rom. It will cause system crashes and SIM card won't work anymore until a reflash of Pie modem.
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It also happen with B7, at least for me. In Italy I use Iliad and.. there's no 4g available for me. 3g works but, if it's like how you said, we need to wait for the next update.
nitroax said:
Updated using VPN method and i got no problems with signal. 4G works great like in Oreo. (Im from Portugal)
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10.0.2.0 or other version of Firmware Pie?
Pjotr91 said:
It also happen with B7, at least for me. In Italy I use Iliad and.. there's no 4g available for me. 3g works but, if it's like how you said, we need to wait for the next update.
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Yes, i confirm that these are the only bands available after the update View attachment 4661976
jack_21 said:
Yes, i confirm that these are the only bands available after the update
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Where I can look at this information? Is there any code? Where did you find this?
Pjotr91 said:
Where I can look at this information? Is there any code? Where did you find this?
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Network Signal Guru app
I guess we cant do anything unless some developer releases some fix for that or Xiaomi releases update.
Sent from my Mi A1 using XDA Labs
TrueMS said:
I guess we cant do anything unless some developer releases some fix for that or Xiaomi releases update.
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I have to say I'm amazed that Xiaomi can release a rom with missing bands. It seems so incompetent. Considering Europe in particular uses these bands and this is the market they are trying to break into it would seem another massive own goal (after the phone for £1 UK farce)!
Can you guys try to use a launcher like Nova that allows to go to activities, search for Settings.BandMode and select Automatic, and see if it helps?
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Consider as well that people who have this issue have been "forcing" the update when they were not supposed to get it... You can't blame Xiaomi for that.
If some people got the OTA "normally" and have this issue, then I can understand the complains, but so far it's only people with 0 patience and disregarding the advice of others who warned about risks for LTE while forcing the OTA (and in case it's not clear for some, LTE==4G).
redbullman said:
I have to say I'm amazed that Xiaomi can release a rom with missing bands. It seems so incompetent. Considering Europe in particular uses these bands and this is the market they are trying to break into it would seem another massive own goal (after the phone for £1 UK farce)!
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BtB said:
Can you guys try to use a launcher like Nova that allows to go to activities, search for Settings.BandMode and select Automatic, and see if it helps?
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I've already tried that with no change... I tried from *#*#4636#*#* three dots, Select Radio Band
BtB said:
Consider as well that people who have this issue have been "forcing" the update when they were not supposed to get it... You can't blame Xiaomi for that.
If some people got the OTA "normally" and have this issue, then I can understand the complains, but so far it's only people with 0 patience and disregarding the advice of others who warned about risks for LTE while forcing the OTA (and in case it's not clear for some, LTE==4G).
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This is simply wrong on a technical level. There is only one version of the update. I also factory reset and the bands are still missing. It's been established that xiaomi have omitted many of the bands. If you go on the firmware thread that joey huab updates he clearly explains that the bands are missing on the pie firmware. It has nothing to do with using a vpn to get the update early!
---------- Post added at 04:28 PM ---------- Previous post was at 04:26 PM ----------
arc4d14n said:
I've already tried that with no change... I tried from *#*#4636#*#* three dots, Select Radio Band
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You have to wait for xiaomi firmware update. The bands are missing.
My wife got the update ota on the mi a1 and also no 4g anymore. No vpn push or anything.
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