Related
I recently bought a second-hand SGS, supposedly locked to 3. The firmware was from 3 UK, but when I punched in *#7465625# it showed all locks are OFF.
Hot for tasty Froyo, first thing i did was to upgrade from the branded Eclair ROM the phone came with to an unbranded stock Froyo ROM. Kies gave me a hard time so I used ODIN. Then I inserted my SIM and realized I could not make calls or even register on my GSM network. (Had not tried the SIM before, so I don't know if the flash caused this)
I found out that the flash had changed my Product Code to KOR, but I managed to change it using THIS GUIDE. However, the step "rm -rf /efs/nv_data.bin.md5" did not work as it was write/read protected. After reboot, the SIM didn't work so I did the "busybox chown 1001:1001 /efs/nv_data.bin". The procedure changed the Pcode to H3G, which I think is the original code, although I was going for XEE.
IMEI has not changed (*#06# gets same no. as is printed below battery)
I live in Sweden, my present CSC is XEE, Product Code is H3G. Network Control Key is 00000000, could this be related?
I considering doing the Product Code change procedure again and see if I can change it too XEE hoping that will fix it, but I'm not even sure this is related to my problem.
Other than that, I'm running out of ideas. However, I'm new to the SGS scene. I'm reaching out for someone with more experience to give me some new ideas.
I've spent hours and hours at this and I've googled like possessed. If I'm being a noob or have overlooked something, let me know - just tell me what I should do to fix this phone.
Go into Settings > Wireless and Network > Mobile Networks and check that Network Mode reads as auto mode. Then open Access Points Names and check that APNs are listed that suit your carrier.
If all of that checks out, go into an app like SGS Tools and use the secret code to check Band Selection.
Thanks for your reply!
I have inserted APN for data. Though, is this really necessary just for 2G calls and SMS?
When I choose "Select Automatically" in Settings/Wireless and network/Mobile Networks/Network Operators then I sometimes get "Registered on network". Then, when trying to call, I get "Data network not available". Band Selection (from SGS Tools secret codes) show:
= BAND SELECTION =
[1] AUTOMATIC []
[2] WSCDMA BAND []
[3] GSM BAND []
[4] COMBI BANDS []
When I select the network operator manually, I get "Unable to select network. Select automatically".
An alternative Go to Rom Kitchen build a rom with
XWJS8 > Hardcore Kernel >CSC CPW > Modem JPY and whatever else you require that should give all UK main networks .
http://romkitchen.org/sgs/?s=generator
jje
losdrivare said:
Thanks for your reply!
I have inserted APN for data. Though, is this really necessary just for 2G calls and SMS?
When I choose "Select Automatically" in Settings/Wireless and network/Mobile Networks/Network Operators then I sometimes get "Registered on network". Then, when trying to call, I get "Data network not available". Band Selection (from SGS Tools secret codes) show:
= BAND SELECTION =
[1] AUTOMATIC []
[2] WSCDMA BAND []
[3] GSM BAND []
[4] COMBI BANDS []
When I select the network operator manually, I get "Unable to select network. Select automatically".
Click to expand...
Click to collapse
I got Data Network not available when I was investigating my phone (that is, messing about) and changed my Network Mode. Go to Settings > Wireless and Network > Network Mode and choose GSM/WCDMA Auto mode. If you don't have connection, then try first GSM Only, then WCDMA Only...then back to both.
And yes, you need to have a data network connection to make calls. Not sure why. Must be something to do with billing.
I would hate to be right but are you sure, as you've bought it second hand, that it hasn't been registered as stolen? Do you know any history of the phone?
Product code should be GT-I9000HKDXXX, where XXX should be your CSC which is XEE that makes it: GT-I9000HKDXEE, you should not use H3G at all.
double post...sorry
JJEgan said:
An alternative Go to Rom Kitchen build a rom with
XWJS8 > Hardcore Kernel >CSC CPW > Modem JPY and whatever else you require that should give all UK main networks .
Click to expand...
Click to collapse
Thanks, but I would need the Swedish networks. The phone is from UK whereas I live in Sweden and have a Swedish operator (halebop).
rschenck said:
I got Data Network not available when I was investigating my phone (that is, messing about) and changed my Network Mode. Go to Settings > Wireless and Network > Network Mode and choose GSM/WCDMA Auto mode. If you don't have connection, then try first GSM Only, then WCDMA Only...then back to both.
And yes, you need to have a data network connection to make calls. Not sure why. Must be something to do with billing.
Click to expand...
Click to collapse
Weird, I was sure APN is only required for MMS and Internet, not for calls and SMS. Anyway, I have APN so that's not it.
ross_ctr said:
I would hate to be right but are you sure, as you've bought it second hand, that it hasn't been registered as stolen? Do you know any history of the phone?
Click to expand...
Click to collapse
No, I don't and I can't be 100% sure it's not stolen. However, I have a bill of sale with all his information and I know where he lives so if that's the case, it can be sorted.
[Ramad] said:
Product code should be GT-I9000HKDXXX, where XXX should be your CSC which is XEE that makes it: GT-I9000HKDXEE, you should not use H3G at all.
Click to expand...
Click to collapse
I think you are right, and I managed to change it so now both CSC and Product Code reads XEE, which should be correct for Sweden. However, the problem remains the same.
There is a possible solution from HERE, however it seems rather ...old. Having no other ideas I'll try it unless someone comes up with a better idea:
Richthofen said:
Possible problems (I had them all due trying different thing to solve it):
No service.
There is no service even a functional SIM card is inserted.
You cannot receive or make calls, receive or send sms, etc (obviously).
Freeze / lock-down.
The phone will not react to anything besides pressing power key.
You cannot unlock the display to enter PIN code.
Wrong PIN code.
The phone will not accept any PIN code on any SIM (even the correct one ).
Phone displays "wrong PIN code" message even the try counter (three strikes you know) does not change.
Product code changed to KOR.
= Blocked Kies updates (without a registry "hack")
Here is how to fix any or all of them:
Downgrade to I9000XWJM9 firmware with Odin (as usual).
Remove SIM card from the phone (to be able to boot in first place) and start the phone.
Gain root access and install "Root Explorer" (or similar), ADB works too.
Open Root Explorer and go to the "EFS" folder in the root.
Check the date on .nv_data.bak and .nv_data.bak.md5 files.
If it is earlier than 08/26/2010 you´re clear, if it is later then you may stop reading.
Once the date has been checked, select files nv_data.bin and nv_data.bin.md5 simultaneously and delete (yes, delete) them. Reboot the phone.
Now your phone is in the same condition (atleast permanent memory wise) as it was prior I9000XXJPC update.
There is a safety feature I would call "a dead mans switch".
If the current nv_data files are deleted, the phone will make new nv_data files from the .bak (backup) files (if they excist). The new nv_data files will be signed automatically so they pass the checks (none of the errors listed above will occur). However if they do not excist, the phone will just write an empty / test file (= IMEI corrupted, no service, etc). Also if you just rename .bak files they will have wrong signatures and the same problems will occur.
There is no bootloaders included, so it is safe to flash for everyone.
Click to expand...
Click to collapse
Have you tried doing a factory reset? May not work but may be worth a try.
Could only be either apn related (doubtful), faulty sim or stolen/lost phone. Unless hardware related.
Sent from my GT-I9000 using XDA App
losdrivare said:
Thanks, but I would need the Swedish networks. The phone is from UK whereas I live in Sweden and have a Swedish operator (halebop).
XEE-JS1 Nordic (default XWJS7) CSC then .
jje
Click to expand...
Click to collapse
JJEgan said:
losdrivare said:
Thanks, but I would need the Swedish networks. The phone is from UK whereas I live in Sweden and have a Swedish operator (halebop).
XEE-JS1 Nordic (default XWJS7) CSC then .
jje
Click to expand...
Click to collapse
Thanks, it seems a long shot but I will try it tomorrow.
I've already flashed the phone to XWJM9 with correct CSC folllowing the guide in my previous post. Restoring nv_data.bin and nv_data.bin.md5 from the .bak files didn't help, the .bak files were just three days old so the data there might have been contaminated.
As far as I can tell there's either a hardware fault, the phone is stolen, or I've messed up the precious data in /EFS by my first ODIN flash, before I did the back-up. Every guide should have that backup procedure as first step, mine didn't. :'(
I've mailed my operator so hopefully I'll get an answer tomorrow to whether the IMEI is blocked.
"No service" sucks...
Click to expand...
Click to collapse
i did mistake a big mistake i edit hex file for :
- rpm
-TZ
-FSG
-FSC
-EFS.img.ext4
-nv1
-nv2
-param
Allll set hex to zero , phone now dead no sign of life no usb,not recognized by pc nothing and wont power on , i did the jig usb but none helped
Please note that : nc2 debrick worked fine (all of u here you should use sim card along with it to work ), but now nothing helped after hex editor >
if you wondering why i did that is because when you you erase hex from nv data 1 and 2 , network lock removed and phone recognize the SIM CARD APN but cause off null/00 imei network not registered( i think this may help some ) , also guys when flashing the Sprint nv1 and 2 network lock removed but imei turns to null/00 or /00
so this may help you all guys , but please some one help me
When LTE problem
Run Phone Info ( Samsung)
Run Service Mode (Root )
CDMA
COMMON
REBUILD
NV REBUILD MODE SELECT:
SYSTEM,PROTOCOL,GPS, IMS
REEBOT
READY
LTE ENABLED !!!! IN EU ( e.g POLAND )
Regards
Please somebody help to modify firmware to enable international GPRS connections
What we currently have:
1. Mi Bunny Watch Q is Working on MT6261 SOC
2. Operating system is modified 2011 year Nucleos RTOS, which was widely used in older featurephones
3. Firmware is not available for separate downloading. Watch updating is OverTheAir (via Bluetooth connection from your smartphone with original APP, and, PROBABLY via GPRS connection) firmware files are called
SH08_PCB01_gprs_MT6260_S00.MAUI_11B_W13_08_MP_V15.bin
My current firmware version is MAUI.11B.W13.08.MP.V15
updates are downloaded from http://upgrade.imibaby.net/upgradeWatch
also you can find http://sw105-online.imibaby.net/ link in firmware - probably for watch activation
All we have now - full ROMdump of my watch divided to parts with Readback Extractor mtk
Also we can get acess to NVRAM and FAT partition with MauiMETA_v9.1635.23 tool (you need NVRAM database file for MT6261 chip - i've gt one from Keneksi X8 firmware kit ( or from official site ) also i have used scatter file from Keneksi to download ramdump with SP Flash Tool
Also there is good tool Binwalk which i don't know how to use well
4. Watch activation procedure looks like: ( english user manual for similar product )
-turn on the watch (lights on and sound prompt)
-insert SIMcard (sound prompt)
-----------we are currently here------------------
-GPRS connection is automatically established
-and watches time should set up the time (you get a sound prompt) /what notifies server of pairing ready status/ - this should be a sign and confirmation of successful internet connection
-you scan QR code in your user-manual (smartphone receives pairing settings from server) and establish connection between smartphone and WATCH
...
5. Watch officially supports only Chinese SIM cards. Confirmed by manufacturer. Chinese cellular operators settings are preinstalled. MNC MCC and APN can be found in firmware like 460 46000 46002 46007 etc
i have tryed to change MCC and MNC to my operators (25501) (my operator supports any APN so i got luck here)
and have got a breakthrough here - watch began to establish GPRS connections via "internet" APN
but no luck - time is not set up, i've got no "successful connection" sound prompt, and it is still impossible to activate it.
I have contacted manufacturer via Weibo and WeChat.
Everywhere i got refused with corporate security reasons, BUT at the very beginning i think some very helpful manager answered and tryed to give help (later he disappeared)
He requested from me to fill up XML form with my cellular operator's settings and sent image explaination
Hello,Mr Pumpkin
There is some instructions you can follow.
First,please make sure the sim card support calling in or calling out.
Secondly,be sure the sim card supports 2G GPRS connection.
You can consult the local operators about specific parameters.
The "code" parameter and "apn" parameter in the following table must be filled in correctly.
The other parameters are alternative.
Code:
<?xml version="1.0" encoding="UTF-8" ?>
- <Account>
- <AcntHdr>
<AcntVer>1.0</AcntVer>
</AcntHdr>
- <AcntBody>
- <SIM Operator="BEELINE" Code="25502">
- <Item Bearer="GPRS">
<AppType>WAP</AppType>
<Title>Beeline WAP GPRS</Title>
<APN>wap.beeline.ua</APN>
<Authentication>NONE</Authentication>
<Homepage>http://wap.beeline.ua</Homepage>
<Proxy Enable="Yes" ProxyAddress="172.29.18.192" ProxyPort="8080" />
<PrimaryDNS>null</PrimaryDNS>
<SecondDNS>null</SecondDNS>
<IPAddress>null</IPAddress>
<Subnet>null</Subnet>
<ConnectionType>HTTP</ConnectionType>
</Item>
Click to expand...
Click to collapse
There is excellent site with lots of information
https://www.dr-lex.be/hardware/china_phone_flashing.html
Also some discussion is going on MIUI forum and russian 4pda forum
International Apn settings
The answer from the Chinese manufacturer is an xml file that we should add to the device ROM. It is not so different to the following thread
https://forum.xda-developers.com/showthread.php?t=2387346
I have my bunny watch 2, that I have paired during a visit to Sz, and will try to add the xml file today. Hopefully we can get a connection.
EASolana said:
The answer from the Chinese manufacturer is an xml file that we should add to the device ROM. It is not so different to the following thread
https://forum.xda-developers.com/showthread.php?t=2387346
I have my bunny watch 2, that I have paired during a visit to Sz, and will try to add the xml file today. Hopefully we can get a connection.
Click to expand...
Click to collapse
Excellent desicion! I will try to do it.
I can assume, that developer didn't offered me this thing because we actually don't have access to ROM. We can get there only with MAUI META tool. Also the watch is not based on Android, so we will have to find correct folder to place the file and guess correct name for it.
Also XML should be specifically formatted, and we have this format from developer.
Easier said than done, but still I got some progress today.
After reviewing the ROM I was able to find several At commands to control the device.
I'm missing the sintaxis on many of them, but I was able to directly perform and receive a call from the Hyper terminal.
I named the xml file default.xml and placed on the root directory and several others but no luck achieving a Apn configuration.
Also I browsed the fat and nvram looking for hints on how the device was configured while using the Chinese card, but no luck there.
If I'm able to find the device configuration At command it should be pretty straightforward.
Just as a note, the App is fully Chinese, no options on the menu are translated.
EASolana said:
Easier said than done, but still I got some progress today. .
Click to expand...
Click to collapse
Some of terminal AT+ commands work excellent (like ATD Most interesting one is AT+DEBUG_ON and AT+DEBUG_OFF it changes usb connection type. ( With debug on you will get 2 usb devices (usb com, and modem)
About app - i have translated it to russian, if it can help )
Connecting outside of china
Well, today I got connection from outside of China.
I played with several of the At commands that were supposed to actually configure the settings, and all seemed to make the terminal hang.
But after rebooting the phone it got a connection. Now it's fully working.
I used the AT+CGDCONT command.
Then I reviewed again the Fat to look for changes and the only file that was modified is store_info. Dat file.
That file was loaded in the same back up you made, with China Mobile settings, and now mine has got the unicom settings.
For the information it contains it looks fairly similar to the format the engineer gave you a solution for.
EASolana said:
Well, today I got connection from outside of China
Click to expand...
Click to collapse
Excellent news. Now i just would like to have some more details, on how i could repeat your success.
AT+CGDCONT is not working for me - no answer from watch to this command.
Can you provide some more info. What MCC and MNC does your cellular operator has? What version of firmware do you use.
Did you actually implemented any changes to your firmware?
Which terminal software do you use? Which COM device you selected? Was DEBUG mode active?
Or what should i do to get my watch connected?
Thank you.
Hello,
EASolana said:
I have my bunny watch 2, that I have paired during a visit to Sz, and will try to add the xml file today. Hopefully we can get a connection.
Click to expand...
Click to collapse
Did you connected with a Chinese Sim card and then changed it to a foreign one?
So I first activated my device in China with a Xiaomi Sim card.
Then traveled back to Hk, and tried with Hk local China unicom, China Mobile and three Sim cards. None worked.
Then I tried the at command for setting up the Apn settings on the device. The commands would not give an OK response, so I do not know exactly which one worked.
Then rebooted the device, and it can connect with Three and China mobile cards. UNICOM still not working.
I saw the change in the file mentioned above. It changed from one operator to the other.
HK is not so far from China, so i think there could be native support for your operators.
Anyway, could you please provide other then China Mobile store_info.dat file from your FAT partition, and a ROMdump to compare. I think you have a more fresh watch firmware. Thank you
Today I'm in China so I will not be able to upload the files to a G drive location, tomorrow I should be able to upload them.
I have bought a new device today (this time the mini GPS, 6261 based) and done a backup before the network registration and after.
I can confirm that all changes are happening to the file named "store_info.dat", and all the new data is matching to the xml format you were given. But written on a low level way inside the .dat file.
The GPRS - APN settings are independent of the GSM settings. So you will need 2G settings for your local operator, be sure you are registered in the network by performing a call to your SIM Card number then modify the store_info file with your specific operator parameters. Be sure to do this on the Hex editor so file length is constant after your perform the modification.
EASolana said:
So you will need 2G settings for your local operator, be sure you are registered in the network by performing a call to your SIM Card number then modify the store_info file with your specific operator parameters. Be sure to do this on the Hex editor so file length is constant after your perform the modification.
Click to expand...
Click to collapse
I am bothered with MCC and MCC settings. All i can see in DAT file is apn for internet wap and mtp, but no readable data about cellular operator
Update: i have sniffed through the firmware again, and i got that China, Hong-Kong and Taiwan are natively supported by the watch... Probably you will get some problems with diferrent cellular operators, but all 3 MCC codes 460 466 and 454 are in firmware
If you keep looking in the firmware, just bellow the MCC codes you will actually find the APN settings. Keep searching to the bottom of the file and you will find the W. A. P... U. N.I.C.O.M... C.H.I.N.A...M.O.B.I.L.E part of the string, that means that beside replacing your MMC on the top of the file above by replacing the 460, 466, 454 codes, you also have to look toward the end of the file and replace the 460000, 454000, 46600 codes with your combination of MCC and MN settings.
Since you cannot add length to the file, remember to find an operator WAP setting that will fit in the current.
EASolana said:
460000, 454000, 46600 .
Click to expand...
Click to collapse
all of them? - i was trying all of this, except editing DAT file
Please, share your DAT file
Also please, tell me MCC and MNC of your HK cellular network, on which you have managed to make everything work (perferably for the first time with your watch)
By the way, sniffing around MTK6261 source code led me to interesting things
setting are really preinstalled
custom_config_account.c file from "Source_code_of_6261\code_6261A_L1\custom\common" gives a clue.
I think for now - i have to chose one cellular operator, and fix all it's settings to fit my needs
Yes! I did it!!!!!! Woohoo!!!!
FlamingPumpkin said:
all of them? - i was trying all of this, except editing DAT file
Please, share your DAT file
Also please, tell me MCC and MNC of your HK cellular network, on which you have managed to make everything work (perferably for the first time with your watch)
Click to expand...
Click to collapse
These are the operators that i have tried in HK.
China Mobile
Name: CMHK
APN: cmhk
MCC = 454
MNC = 12
MMSC = http://mms.hk.chinamobile.com/mms
454 07 Unicom
454 11 Hongkong Telecom
454 00 CSL
454 16 PCCW
454 06 Smartone-Vodafone
Attached is the DAT file.
Where you got the source code from?
Source_code_of_6261\code_6261A_L1\custom\comm on
EASolana said:
Where you got the source code from?
Source_code_of_6261\code_6261A_L1\custom\comm on
Click to expand...
Click to collapse
https://mega.nz/#F!JMsgDCYR!qn39qDJ5LzOz1TkUbdqvtQ
Time to sum up progress.
Activation option #1
Have your Chinese Seller activate the device using a Chinese Sim card before shipping, and this should ensure full communication in China, Hong Kong, Taiwan. (460.466.454) and possibly in the following places:
208 - France, 404 - India, 405 - India, 454 - Hong Kong, 455 - Macao, 466 - Taiwan, 502 - Malaysia, 505 - Australia, 510 - Indonesia, 515 - Philipines, 520 - Thailand, 525 - Singapore.
Given that MCC codes for several operators in those countries are included in the list inside the FW.
If you are choosing this way, you need to remember the device is only 2G - GMS 900/1800 compatible, so before you waste time, ensure you carrier is compatible. Australia has just dumpled 2G support so don't even try.
You can execute the following AT code before purchasing the SIM card, and it will tell you the carriers that the device could possibly connect: AT+COPS=?
It will reply the MCC Codes and operator name, with that information you can look for a valid unlocked and activated sim card.
Since device was activated in china it will easily go trough the regular process of scanning the QR code and adding the device to your APP.
Activation Option #2.
Modifiy the MCC parameters inside the FW and include your specific operator details.
FlammingPumpking, you can help us comment on how you succeed with activation.
So my A510F out of nowhere starting doing some weird stuff. When someone tries to call me, the phone instantly goes into emergency calls only mode. Same happens when i try to call someone. I can send text messages, the internet works fine. I tried doing system restore, it didn't help. Also tried flashing a custom rom. I'm still having the same issue. I tested the SIM card in another phone, and the calls go through with no problem. Any help?
Ok... let's start.
RAT Lock to 3G only. The issue persists?
RAT Lock to 2G only. The issue persists?
Bryan48765 said:
Ok... let's start.
RAT Lock to 3G only. The issue persists?
RAT Lock to 2G only. The issue persists?
Click to expand...
Click to collapse
Yes, still the same issue
nexasLT said:
Yes, still the same issue
Click to expand...
Click to collapse
this is after locking or making a call?
wait 3 mins after locking
Bryan48765 said:
this is after locking or making a call?
Click to expand...
Click to collapse
After trying to make a call
nexasLT said:
After trying to make a call
Click to expand...
Click to collapse
Use the USSD *#0011# & select sim. The registered PLMN / MCC MNC is the same in the normal state and emergency calls only? Signal strength and quality is OK (includes ec/io?) TCH rx lvl no longer -- with call / any MNO's USSD code on 2G? Any change if the operator is manually searched and selected?
Edit: I'm suggesting 2G/3G because maybe at some time, the CSC was not applied correctly, disabling volte and leaving CSFB. If *#0011# doesn't work the CSC wasn't applied correctly. Was that other phone connected to another cell (different band preference), or did it have volte enabled?
Bryan48765 said:
Use the USSD *#0011# & select sim. The registered PLMN / MCC MNC is the same in the normal state and emergency calls only? Signal strength and quality is OK (includes ec/io?) TCH rx lvl no longer -- with call / any MNO's USSD code on 2G? Any change if the operator is manually searched and selected?
Edit: I'm suggesting 2G/3G because maybe at some time, the CSC was not applied correctly, disabling volte and leaving CSFB. If *#0011# doesn't work the CSC wasn't applied correctly. Was that other phone connected to another cell (different band preference), or did it have volte enabled?
Click to expand...
Click to collapse
The *#0011# sin't working. The other phone was LG P500, it only has 3G. I'm running Arrived Crystal ROM on the samsung if that helps
nexasLT said:
The *#0011# sin't working. The other phone was LG P500, it only has 3G. I'm running Arrived Crystal ROM on the samsung if that helps
Click to expand...
Click to collapse
If the 0011 disappears with no response, the ril service mode has been debloated. If the 0011 stays with no response, the CSC was not applied correctly. You could alternatively try to open it with root (am broadcast...) Check logcat -s XMLParser:V, there should normally be at least one that doesn't say file not found.
With that rom you likely have root, to apply CSC copy the content of /system/csc/yourcsc/system/ into /system/.
/system/csc/yourcsc/system/etc merges into /system/etc & /system/csc/yourcsc/system/csc merges into /system/csc
Set the permissions of those files (not folders) to 644(owner read write, group read, other read). After this try volte(4G LTE) if available.
Specifically, it's "yourcsc_keystrings.dat" for 0011. Rename it to sm-a510f_keystrings.dat if it doesn't work. This file from any device or CSC could work.
The 0011 isn't the solution to the problem, unfortunately. But it could help us know what's the cause of it.
Something else: (backup the efs in case you accidentally select something unintended, or because maybe it's broken on nougat, 9090 is something different and could cause modem bricks, I've used 9900 on a510fd marshmallow) Enable mobile data while the network becomes unavailable, *#9900#, select run cp based log. In /data/log/err, open litmuslog...txt and scroll down. Google those reject cause codes if there are any.
Showing errors specific to calls is at+ceer(create a backup), an at command that could be run with the 'modem serial port' on a PC or on the Exynos device itself with root and with minicom -D /dev/umts_router.
Also, you could try contacting your MNO. It's likely that they will tell you to restart your device but it's worth a try.
You could try a SIM from another MNO.
I've got nothing else.
Emergency call solved in a510fd
Is the 4-file maintenance ROM capable of repairing the network in a model A510FD and can it solve the problem of emergency calls only?