Database Users

[Q] Sm-G900F without LTE

Hi
I have Sm-G900F with latest firmware NOT root original ROM in the network I only have GSM or WCDMA how can i get LTE option?

the-scorpion said:
Hi
I have Sm-G900F with latest firmware NOT root original ROM in the network I only have GSM or WCDMA how can i get LTE option?
Click to expand...
Click to collapse
Do the S5 G900F supported bands/frequencies match your providers LTE b/f?

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Yes in the option of mobile network i do not have option of LTE

the-scorpion said:
Yes in the option of mobile network i do not have option of LTE
Click to expand...
Click to collapse
Whats your providers frequency and where do you live?

gee2012 said:
Whats your providers frequency and where do you live?
Click to expand...
Click to collapse
it's not about Provider in the device i Have no option of LTE

the-scorpion said:
it's not about Provider in the device i Have no option of LTE
Click to expand...
Click to collapse
Then your provider uses a band/frequency which is probably not supported by the S5.

No you got it all wrong if i have in the smartphone option of LTE that are enable and not getting lte so than you right but in the device i do not have the option of LTE !

the-scorpion said:
No you got it all wrong if i have in the smartphone option of LTE that are enable and not getting lte so than you right but in the device i do not have the option of LTE !
Click to expand...
Click to collapse
This is what i am trying to find here ...http://forum.xda-developers.com/galaxy-s5/help/samsung-galaxy-s5-g900f-lte-t2840070
do you confirm on samsung wesite that your model supports LTE or not.

This my Device
[IMG="This my Device"]http://imagizer.imageshack.us/v2/280x200q90/536/flIkoj.png/IMG]
itechengine said:
This is what i am trying to find here ...http://forum.xda-developers.com/galaxy-s5/help/samsung-galaxy-s5-g900f-lte-t2840070
do you confirm on samsung wesite that your model supports LTE or not.
Click to expand...
Click to collapse

the-scorpion said:
Click to expand...
Click to collapse
that image is so small to see anything - 150x100q90

itechengine said:
that image is so small to see anything - 150x100q90
Click to expand...
Click to collapse
Sorry, this image are better

the-scorpion said:
Sorry, this image are better
Click to expand...
Click to collapse
Mate there is no option to activate LTE, its your provider who has to provide you the key (i.e convert the signals you receive to the band/frequency that of a 4G).
Contact your provider and ask them to activate 4G for your connection. I had to do this procedure for mine too.

You wouldn't expect to see LTE options if your current carrier doesn't support LTE. Can you provide a link to confirm that your carrier is using LTE?
The sm-g900f handset itself supports a set of LTE bands. Possibly your carrier firmware has disabled LTE if they don't use LTE. Again we need you to tell us which carrier the phone was originally sold through and what carrier you are currently using the phone on.
Or just reflash to another 900F carrier firmware, choosing a carrier that is known to use LTE. You should do a search and find the appropriate PIT file for the new carrier and flash that concurrently with the firmware.
Alternately, do a search to find the threads that explain how to use service mode to check your LTE band preferences.
.

fffft said:
You wouldn't expect to see LTE options if your current carrier doesn't support LTE. Can you provide a link to confirm that your carrier is using LTE?
The sm-g900f handset itself supports a set of LTE bands. Possibly your carrier firmware has disabled LTE if they don't use LTE. Again we need you to tell us which carrier the phone was originally sold through and what carrier you are currently using the phone on.
Or just reflash to another 900F carrier firmware, choosing a carrier that is known to use LTE. You should do a search and find the appropriate PIT file for the new carrier and flash that concurrently with the firmware.
Alternately, do a search to find the threads that explain how to use service mode to check your LTE band preferences.
.
Click to expand...
Click to collapse
My provider support LTE because I have NEXUS 5 that WORK on LTE if i insert the same sim card I think that ROM that i have did not support LTE... i search and see that the deceive have Hong kong G900FZHU1ANE3 KitKat rom

Then try a different ROM.
Good luck
.

fffft said:
Then try a different ROM.
Good luck
.
Click to expand...
Click to collapse
YES but i want to avoid installing new rom because it's cancel warranty and i seek other solution if it exist...

This is not problem in your network your network provider not in the list of Samsung lte net list in you have a At&t sim try that in your device lte option will show automatically
If you want fix the issue for your network please contact with me through the pm
Sent from my SM-N7505 using XDA Free mobile app

Thank's the problem was solved I receive firmware update that install VOLTE and then Appeared LTE option. so i was right that was the problem of firmware

the-scorpion said:
Thank's the problem was solved I receive firmware update that install VOLTE and then Appeared LTE option. so i was right that was the problem of firmware
Click to expand...
Click to collapse
I'm having a similar problem with my S5 G-900I.
Android version: 4.4.2.
baseband version: G900IZTU1ANE2.
Kerenel version: 3.4.0-1630870 [email protected] #1 Sat May 17 00:37:29 KST 2014
build number: KOT49H.G900IZTU1ANE3.
Can you tell me how did you get the firmware update?
Thanks,
Ran

Hi,
ROOT ONLY!
I wonder if the note 3 fix will work with S5?
backup your device before...
2 methods:
http://smokeys.wordpress.com/2014/04/06/how-to-enable-lte4g-on-samsung-galaxy-note-3-sm-n9005/
http://droidviews.com/wp-content/uploads/2013/05/fix-file-permission-root-browser.jpg
Be sure permissions of persist.radio.lteon are set to rw and then to “true” inside this file, after altering the file save the file and make it read-only.
Reboot your phone, now you will see and be able to pick the option “LTE/WCDMA/GSM (auto connect)” in Network Mode menu
Important: before altering ANY file on your phone be sure you have a copy of the original, unaltered file!!!
I even found: find the file with this EXACT name 'persist.radio.lteon' and delete it.
Becareful with this i perfer to chance it name & loction not delete it.. (onlt if this first meton didn't work...)
Other methods:
http://forums.androidcentral.com/htc-one-m8/381464-turn-off-lte-t.html#post3586830
=
Anyone have all MSL number for all S5? anyone has SPC Utility.apk ?
http://s4gru.com/index.php?/topic/1961-network-visionlte-cincinnati-market/?p=307815
=
http://forum.xda-developers.com/showpost.php?p=53591425&postcount=9
=
http://forum.xda-developers.com/showthread.php?t=2724464
can anyone can confirm all of this?
and tell me what help you and which model & LTE Service Provider you have?

[GUIDE]Remove baseband restrictions

EDIT:
@devilsshadow has done a more useful guide in this thread based on the discussion here so this thread will be closed!
http://forum.xda-developers.com/oneplus-one/general/guide-unlock-aditional-bands-qualcomm-t2877031
Hi all,
seems that some guys where able to remove software based baseband restrictions from SnapDragon modem chips so it is possible that you use your phone in every band that is supported by your hardware. In that post a driver for OnePlus is linked too For worldwide travellers this seems to be quite comfortable.
In the quoted post you'll find the necessary drivers for our OPO and in the first post you'll find the whole procedure.
http://forum.xda-developers.com/showpost.php?p=55395908&postcount=153
BE CAREFUL!
BRICKING OF DEVICE IS POSSIBLE!

So, what bands are available after doing this? Are there any unmentioned bands?

Dusty Rhodes said:
So, what bands are available after doing this? Are there any unmentioned bands?
Click to expand...
Click to collapse
Just take a look at the first post in the thread. Some bands are restricted through software. There is a screenshot before & after unlocking. There are a lot of LTE frequencies which are unlocked etc. It depends on the modem of your phone.

I believe this is only worthwhile for the Chinese OPO to unlock the worldwide LTE bands to be able to use it in the US.

Dzhedaj said:
I believe this is only worthwhile for the Chinese OPO to unlock the worldwide LTE bands to be able to use it in the US.
Click to expand...
Click to collapse
Possible, I can't prove that because I've got the international version. But as far as I know many here in the forum are using the chinese version of the OPO so perhaps it could be useful.

Added to OnePlus index thread
[INDEX] OnePlus One Resources Compilation Roll-Up

timmaaa said:
Added to OnePlus index thread
[INDEX] OnePlus One Resources Compilation Roll-Up
Click to expand...
Click to collapse
Thank you, a good idea!

Glatzi said:
Thank you, a good idea!
Click to expand...
Click to collapse
No, worries. I add all important threads to my index.

Did anybody succeed enabling 800 MHz LTE for Europe?

Thanks for posting this I travel all over the world and this will be very helpful to me. I will try this out after work and see what bands I am able to access.

This doesn't matter for OnePlus One , we don't have restrictions in the baseband. You can use it worldwide without doing this thing.

SergioTeddy said:
This doesn't matter for OnePlus One , we don't have restrictions in the baseband. You can use it worldwide without doing this thing.
Click to expand...
Click to collapse
If you have the Chinese OPO, you do have restrictions (aka those who bought the phone without a invite)
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INT: International
CHI: Chinese

how do you get into the relevant diagnostic/debugging mode with the 1+1 .
Download mode is easy, +vol and power with usb connected, or +/- with usb connected but not diagnostic, the process described doesn't work in download mode.

*#*#4636#*#*

That's not diagnostic mode though is it ? That's just the test app.
Sent from my A0001 using Tapatalk

SergioTeddy said:
This doesn't matter for OnePlus One , we don't have restrictions in the baseband. You can use it worldwide without doing this thing.
Click to expand...
Click to collapse
But would this allow to have the extra LTE channels? Some say it doesn't have the antennas for it but not sure and it might be licensing stuff.

fards said:
That's not diagnostic mode though is it ? That's just the test app.
Sent from my A0001 using Tapatalk
Click to expand...
Click to collapse
From what I've read diagnostic mode is ROM dependent. Can anyone with a stock CM11 S try the following from phone:
*#*#8778#*#*
On my crdroid variant this magix sequence does not work. Regarding orgingal thread the phone should just go off screen without any error after typing this numbers.

Glatzi said:
From what I've read diagnostic mode is ROM dependent. Can anyone with a stock CM11 S try the following from phone:
*#*#8778#*#*
On my crdroid variant this magix sequence does not work. Regarding orgingal thread the phone should just go off screen without any error after typing this numbers.
Click to expand...
Click to collapse
Seems to do nothing on my CM11s.

None of the existing short codes work. We have download mode by pressing both vol buttons while the device is powered off and connected. This mode is close but it's not quite the same.
Which is why I asked, I've tried all the other published ones. Someone in the other thread said they'd got the devices showing up in device manager, but not how.
Sent from my A0001 using Tapatalk

fards said:
None of the existing short codes work. We have download mode by pressing both vol buttons while the device is powered off and connected. This mode is close but it's not quite the same.
Which is why I asked, I've tried all the other published ones. Someone in the other thread said they'd got the devices showing up in device manager, but not how.
Sent from my A0001 using Tapatalk
Click to expand...
Click to collapse
Yeah, I can't get past the 3rd step either. And step 3.5 is a bit confusing as I don't understand what I'm supposed to use to enable the diagnostics port. Any help would be appreciated.

Sprint Aquos Crystal UICC Unlock program

Hello, I said there is a trick to UICC unlock 306SH unofficially, and here it is.
Please try out and feedback.
Since it's very easy to reverse this APK, please don't leak the details to public or SHARP.
USE THE APK IN 306SH UNLOCK THREAD INSTEAD.
I don't know which f**king guy edited this and below there are full sources. It works exactly same as official "UICC Unlock". I'm not responsible for anything happened to your phone.
Restoring is easy. Just edit my source and change "LTE forced" to "0".
Mod Edit. Please be careful using this tool as it appears to be a work in progress. It is probably a good idea not to use this unless you know exactly how to restore your device.

Reserved.

Thank you for work and as you asked I will give feedback about it.
Phone 306SH.
Tested in Russia, native bands is GSM 900 and 1800.
When sim-card inserted into phone:
No new messages that sim-card is wrong.
Looks like no signal from mobile operator and phone all time looking it.
Phone install automaticly correct operator`s access points but cant connect.
Maybe we need to change working bands on phone somehow? From CDMA to GSM?
In 305SH it is possible in the service menu (*#*#4636#*#*)...
P.S. tested names of operators: Megafon, Yota.

Also I checked this app on 305SH - no results.
Same message after reboot: "USIM card error"

4g switcher
Download 4g switch from the playstore and change it to gsm
RealZel said:
Thank you for work and as you asked I will give feedback about it.
Phone 306SH.
Tested in Russia, native bands is GSM 900 and 1800.
When sim-card inserted into phone:
No new messages that sim-card is wrong.
Looks like no signal from mobile operator and phone all time looking it.
Phone install automaticly correct operator`s access points but cant connect.
Maybe we need to change working bands on phone somehow? From CDMA to GSM?
In 305SH it is possible in the service menu (*#*#4636#*#*)...
P.S. tested names of operators: Megafon, Yota.
Click to expand...
Click to collapse

Use file unlock for all sprint samsung, but i think it cannot unlock for device not have a gsm band
http://www.mediafire.com/download/9mi2xqkbk1aw7zd/MyFirstApp_(1).apk

My phone is now unusable after using this. I installed, and it said must manually reboot, and now it shows no service at all. Im in a CDMA only area and need to undo whatever this did. Can you help?
Thanks
CDMA option greyed out
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hemanolio said:
My phone is now unusable after using this. I installed, and it said must manually reboot, and now it shows no service at all. Im in a CDMA only area and need to undo whatever this did. Can you help?
Thanks
CDMA option greyed out
Click to expand...
Click to collapse
go to sprint company and run firmware again

don't unlock UICC, if you unlock, it cannot change prefere network anymore

tewilove said:
Hello, I said there is a trick to UICC unlock 306SH unofficially, and here it is.
Please try out and feedback.
Since it's very easy to reverse this APK, please don't leak the details to public or SHARP.
https://drive.google.com/file/d/0B5QYBzdG6RuyakFNREdNZHc1N0E/view?usp=sharing
Click to expand...
Click to collapse
Logcat on your application on 305SH shows a lot of errors for each commands:
Your code:
MainActivity.this.writeSimLock(1);
MainActivity.this.writeKey("./LTE/Service/Enabled", "1", "INT");
MainActivity.this.writeKey("./LTE/Service/Forced", "1", "INT");
MainActivity.this.writeKey("./CDMA/B41/enablement", "1", "INT");
MainActivity.this.writeKey("./CDMA/B26/enablement", "1", "INT");
MainActivity.this.writeKey("./CDMA/B25/enablement", "1", "INT");
MainActivity.this.writeKey("./CDMA/B10/enablement", "1", "INT");
MainActivity.this.writeKey("./CDMA/B0/enablement", "1", "INT");
MainActivity.this.writeKey("./LTE/B1/enablement", "1", "INT");
MainActivity.this.writeKey("./LTE/B3/enablement", "1", "INT");
MainActivity.this.writeKey("./LTE/B7/enablement", "1", "INT");
MainActivity.this.writeKey("./LTE/B41/enablement", "1", "INT");
For each line, the result is:
/JavaBinder( 1304): *** Uncaught remote exception! (Exceptions are not yet supported across processes.)
/JavaBinder( 1304): java.lang.RuntimeException: bad array lengths
/JavaBinder( 1304): at android.os.Parcel.readStringArray(Parcel.java:967)
/JavaBinder( 1304): at jp.co.sharp.android.chameleon.dataservice.externalinterface.data.Data.<init>(Data.java:48)
/JavaBinder( 1304): at jp.co.sharp.android.chameleon.dataservice.externalinterface.data.Data.<init>(Data.java:18)
/JavaBinder( 1304): at jp.co.sharp.android.chameleon.dataservice.externalinterface.data.Data$1.createFromParcel(Data.java:35)
/JavaBinder( 1304): at jp.co.sharp.android.chameleon.dataservice.externalinterface.data.Data$1.createFromParcel(Data.java:33)
/JavaBinder( 1304): at jp.co.sharp.android.chameleon.dataservice.phonedata.IPhoneDataService$Stub.onTransact(IPhoneDataService.java:81)

Correction is simply make the String[] with size 4.
And it won't work no matter it's corrected or not cos 305SH has no handler code for this logic.

sorry I don t understand all:
Your apk is for 306sh only ? and what is it doing ? unlock ? with gsm sim card ?
it works ? (without any changes of string size ?)

Found someone in Shanghai cheating customers saying nearly unlocked or may be official unlocked in Feb. 2015. Possibly using my program.
Sent from my MI 4C using XDA Free mobile app

tewilove said:
Found someone in Shanghai cheating customers saying nearly unlocked or may be official unlocked in Feb. 2015. Possibly using my program.
Sent from my MI 4C using XDA Free mobile app
Click to expand...
Click to collapse
There are source code and kernal are allready available to download...someone devloper do something for unlocking..pls....
link for souce code of sharp crystal aquos X
" https://sh-dev.sharp.co.jp/android/modules/oss/index.php?/crystalx"
for ADB driver latest "https://sh-dev.sharp.co.jp/android/modules/driver/"
for sharp aquos crystal(305sh) japan) link for source code and kernal are...
"https://sh-dev.sharp.co.jp/android/modules/oss/index.php?/crystal#"
pls do the needfull...........i am from india

omg,if you run this app,you can not change preferred network type anymore even reset to factory,this is a network lock app!!!
and no 306sh firmware for download or flash.
so don't use this app.

coldface said:
omg,if you run this app,you can not change preferred network type anymore even reset to factory,this is a network lock app!!!
and no 306sh firmware for download or flash.
so don't use this app.
Click to expand...
Click to collapse
yes, it will lock network, don't use this

Add source.
You guys even did not take a look into it and I thought you were able to clear the band lock yourself.
View attachment UICCUnlock_306SH.tar.gz

tewilove said:
Add source.
You guys even did not take a look into it and I thought you were able to clear the band lock yourself.
View attachment 3104360
Click to expand...
Click to collapse
i had checked the source,maybe something wrong,the program write band with LTE B1/B3/B7/B41.
but 306sh supports LTE B25/B26/B41
and 305sh suppots LTE B1/B3/B8/B41
so....

tewilove said:
Add source.
You guys even did not take a look into it and I thought you were able to clear the band lock yourself.
View attachment 3104360
Click to expand...
Click to collapse
i dont understand, what did you mean?

Other Hidden menu Codes
This is only for Sharp Aquos Crystal 306sh (Boost Mobile version)
##3282#
## 33284#
##786#
##8378#
##72786#
##3424#

Redmi Note 3 Special Edition With Android 6.0.1(MM)

The New Special Edition have same specs but several FDD LTE bands have been unlocked along with Band 20.and Also released with Marshmallow.
RECOVERY ZIP:
http://bigota.d.miui.com/V7.3.9.0.M...otwGlobal_V7.3.9.0.MHRMIDE_c850f02625_6.0.zip
FASTBOOT FILE:
http://bigota.d.miui.com/V7.3.9.0.MHRMIDE/kate_global_images_V7.3.9.0.MHRMIDE_20160523.0000.23_6.0_global_f7170696d8.tgz
CAUTION: Dont Flash this on Kenzo or Hennessy.
If you want to try it on KENZO then visit the below:
http://forum.xda-developers.com/redmi-note-3/development/miui-7-global-7-3-9-stable-redmi-note-3-t3405876
Special Thnx to andersonaragao,for the ported rom.
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"lightbox_download": "Download",
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Can we flash it? is everything working? and is it for RN3 SD?
Edit : it is only for taiwan edition

special.. what is mean

It supports LTE band 20, which is important for some countries. @banmeifyouwant Is the zip file enough to unlock band 20 on our kenzo?

eray0687 said:
special.. what is mean
Click to expand...
Click to collapse
Its a special edition launched in taiwan

Try it or die said:
It supports LTE band 20, which is important for some countries. @banmeifyouwant Is the zip file enough to unlock band 20 on our kenzo?
Click to expand...
Click to collapse
Yup it has same spec as Kenzo.SD 650 also supports band 20.

Has Band28, so good for NZ/AU users

Normal users can flash or only for Taiwan?

Try it or die said:
It supports LTE band 20, which is important for some countries. @banmeifyouwant Is the zip file enough to unlock band 20 on our kenzo?
Click to expand...
Click to collapse
We will have to edit the nvram value, i think. I don't know android at this high level yet, but the one thing i know is that in the field of developing there are endless posibilities, so i am pretty much sure it would be unlocked in the future, maybe 6 or so months.
---------- Post added at 05:10 PM ---------- Previous post was at 05:09 PM ----------
prashu#1 said:
Normal users can flash or only for Taiwan?
Click to expand...
Click to collapse
Only on taiwan, cause the modem won't work for global edition. We will have to tweak it.
---------- Post added at 05:12 PM ---------- Previous post was at 05:10 PM ----------
I think i will download it and maybe force flash it, so maybe there are chances it could work, other than that i could try to flash modem seperately and hope that it would work. Besides these two ways, i cant do a damn thing. Give me a day to flash and, ill post the result here.

any fastboot links?

Looking forward to Band 28 support!

caesar13th said:
any fastboot links?
Click to expand...
Click to collapse
Nop....Maybe in few day they will upload.

syl0n said:
Looking forward to Band 28 support!
Click to expand...
Click to collapse
Yup..

The Special version of Redmi Note 3 Pro (=kate) has the following bands:
4G
FDD-LTE
B1 / B2 / B3 / B4 / B5 / B7 / B8 / B20 / B28
TD-LTE B40
3G
TD-SCDMA 1900 / 2000MHz (B34/B39)
WCDMA 850 / 900 / 1900 / 2100MHz(B1/B2/B5/B8)
2G
GSM 850 / 900 / 1800 /1900MHz
http://mobile.mi.com/tw/note3/#specs

caesar13th said:
any fastboot links?
Click to expand...
Click to collapse
http://bigota.d.miui.com/V7.3.9.0.M...DE_20160523.0000.23_6.0_global_f7170696d8.tgz

Any 1 tried it?

Can anyone upload the modem file from the rom. I want to try to flash it but don't want to download 1.5gb. Plus can anyone confirm that the band can be unlocked with modem image. What about other limitation, like kenzo is capable of quick charge, but the kernel laks it, does this device's kernal has the requirements to support quick charge.

[email protected] said:
http://bigota.d.miui.com/V7.3.9.0.M...DE_20160523.0000.23_6.0_global_f7170696d8.tgz
Click to expand...
Click to collapse
It has different partition than our device (kenzo), so be careful.
Sent from my Redmi Note 3 using XDA Labs

Some guy at MIUI forum has flashed it and he is saying its working...
http://en.miui.com/thread-299420-1-1.html

madkiran said:
Some guy at MIUI forum has flashed it and he is saying its working...
http://en.miui.com/thread-299420-1-1.html
Click to expand...
Click to collapse
But he didnt flash the modem, so there is no way of knowing about other lte band. He also stated that fingerprint was not working.
For thos who want to try, then flash it without modem too. As for finger print, copy the fingerprint modules from cm13 and replace them with the original in miui, fingerprint will start to work.

Use OPPO A37's baseband on OPPO F1S or how could F1S with China Telecom 4G

Hi, everyone.
It might be a long post, so for saving your time, I will put my key question here.
1. If a device which only supporting certain carrier's 4G could work properly for SMS and phone call?
2. Is it possible to directly use the official rom of A37m (MTK6750) on F1S (MTK6750)?
3. How I extract only the baseband from the official rom of A37m, which is ColorOS and put it into an F1S?
I'll put the full story here.
Few days ago, a friend from China come to visit me. And he want to purchase a mobile as the camera of his one is so bad. According to his quest(1. Chinese brand; 2. Good camera; 3. Low price; 4. Support China Telecom), I choosed OPPO F1S for him. It was working well here in Dubai.
The problem starts when he's back to China. He contact me for that the 4G SIM card form China Telecom was not working with the mobile (showed no signal). To solve it I did all these below:
1. I checked again that if F1S supporting China Telecom's 4G(which seems to be at frequecies Band 3 1800 and Band 41 TD2500). And both the offical website data and result from FrequecyCheck.com approved it.
Here's the result:
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2. As from 1 it seems that the problem wasn't from the device, I requested my friend to visit China Telecom office to change another SIM. And he did it, problem still remains ;
3. I requested my friend to borrow a mobile from someone and put his SIM in to see if there is single, which he did it. He borrowed an iPhone SE (A1723), and the SIM card was working well in it. As there was no iPhone SE on FrequecyCheck.com, I checked iPhone 6S (A1700), which is of the same baseband. The result is here:
Wait, for LTE the compatibility is same with F1S, but it also support CDMA at BC0(800) and BC6(2Ghz).
But why I need CDMA(3G, as I thick) if have LTE(4G, as I thick)? And after some search on the Internet I found articles saying that without VoLte the device had to access 3G or 2G to use SMS and phone call.
I was upset but the official web site of R9m(which is the Chinese local version of F1S, as some website says, and according to another friend in China who is using R9m, her mobile works well with the 4G from China Telecom) gave me some hope:
Then I started to have a stupid idea that F1S may also support CDMA band, but somehow it's locked.
4. I started asking my friend to try those "secret code" like *#*#4636#*#* and *#800#* to enter hidden menu while I gave him advise via video chat. I did find a Band Mode menu there (which shows EURO band, AUS1 band and AUS2 band, neither makes any difference) and a baseband choose menu (have Band 0 to Band 41 and so on, and some are selected, but those which are not selected can not be selected). After many hours of trying, I gave it up. :crying:
5. I started to think about that maybe I have to get a baseband from another OPPO device, which supports CDMA and put it into F1S (now with a baseband MOLY.LR11.W1539.MD.MP.V20.3.P30). The R9m was my first choice but then I found A37m, which is with a same MTK6750 CPU. Here is the offical website data and result from FrequecyCheck.com(sorry for the Chinese):
But then after hours of search on the web, I found there was no ready-made baseband pack of A37m on it. I tried to download an official ROM of A37m from OPPO website and extract it, trying to find a file named modem.img or radio.img and here's what I got:
Can't recognize which file is baseband related.
Then I also download an official ROM of F1S (named A1601) and extract it to see if I can find which one is baseband pack by comparing both ROMs:
But with my ultra-limited knowledge I think I got no way to recognize it as well.
Thus, with my biggest and last hope, I'm here, seeking for any help from anyone.
Again, I think I need to find out:
1. If a device which only supporting certain carrier's 4G could work properly for SMS and phone call?
2. Is it possible to directly use the official rom of A37m (MTK6750) on F1S (MTK6750)?
3. How I extract only the baseband from the official rom of A37m, which is ColorOS and put it into an F1S?
Please help me. Any advises would be appreciate.
Thank you.

Please, somebody help me.