Database Info

Lenovo P780 2g/3g problem

I have dual sim Lenovo P780.
PROBLEMS:
DEFAULT SIM SLOT (supports WCDMA and GSM) - works fine only on WCDMA /3G. When I put it on "GSM only" it goes dead - "connection error", "emergency calls only" and all that.
SECOND SIM SLOT (which is GSM only) doesn't work att all.
The sim cards are fine (checked it on other phones).
I also put other sim cards in my phone (and swich them around) => same result - sim 1 only 3G, sim 2 dead
Both of them see the providers but have no signal on gsm/2G mode.
Thanks,

Same problem here?
Any workarounds yet?
Cheers

i have the same problem and I cannot find a solution...

Change radio module ( modem).

the same problem here,
badmania98 said:
Change radio module ( modem).
Click to expand...
Click to collapse
I cant find another one, only for S920.

This is my P780 (S920, S820 are compatible) modem collection :
modem P780.zip
http://www51.zippyshare.com/v/55282913/file.html
But:
1. For Chinese model I recomend V51 or V52 ( on the battery is written in chinese). Both sims works but no WCDMA 900 band( chinese version doesnt have this frecvency) . I use V51.
2. For European model V20, V26. (on the battery is not written in chinese). If it used on chinese model will be no signal on Sim2 (x sign)
How to install:
Download and unzip the file modem P780.zip. Chose modem file.
1. Put the modem file (zip) on the SD
2. Use CWM, TWRP or mobileUncle
3. Install modem from recovery
4. Wipe cache
5.Reboot
Let me know if it works.

badmania98 said:
This is my P780 (S920, S820 are compatible) modem collection :
modem P780.zip
Click to expand...
Click to collapse
Great! Thank you.
Your zip is stored on my computer
Nothing helped, I gave all a try.
But now I found out, thats a problem if my local provider and his radio cell.
When I leave my home cell, all is fine.

I installed S920 V17 modem and both slots works for me now on my P780.

Lenovo P780 3G not working in sim1
Hi Badmania,
I also recently bought a lenovo P780. i didnt realise it was a chinese model only after going through your post. i got a little problem with this handset and i hope u can help me out with it. Slot 1 probably supports 2g/3g connection but i am not able to get 3g connection in the slot 1. i tried swiping the same sim card in another handset of different brand and i can use 3G without any problem. slot 2 works fine with 2g.i am a newbie to this android and i dont have any idea about CWM, TWRP or mobileUncle. i would appreciate and be grateful if you could post step by step procedure to change the radio module ( modem) for Lenovo P780 chinese model. i cant read Chinese and its a big problem for me. Looking forward to hear from you soon.
Regards

Stuck Half way
Download and unzip the file modem P780.zip, chose Modem file= SUCCESS
1.Put the modem file(zip) on the SD= SUCCESS
2. Use CWM TWRP or Mobile Uncle= Downloaded mobile Uncle but cant proceed
Steps i took on mobile Uncle:
1. Clicked "Into Recovery Mode" on mobile Uncle> Reboot to Recovery> OK> WARNING!! ROOT REQUEST!! > Please Root your Android First!!...............i cant proceed further from here! PLEASE HELP ME!

Root + TWRP
Root+ TWRP
Read me file inside.
http://www62.zippyshare.com/v/50541818/file.html

Confused
Dear Badmania,
Thank you so much for your help and support though i couldn't execute the solutions you have provided above properly.
Finally i realized why my 3G connection on slot 1 wasn't working after doing a vast research online. I found out that, in order to use 3G in my country(BHUTAN), i must have a smart phone that supports GSM- 850/900/1800 MHz & WCDMA 850/1900/2100 MHz Frequencies. My network service provider told me that i wont be able to use 3G without these Frequencies in BHUTAN.
As per my knowledge, Lenovo P780(chinese model) supports GSM- 900,1800,1900; UMTS-2100 only. I am worried and confused what to do now. From where and how to add GSM- 850 MHz on this handset?????
Will i be able to solve my problem with the solutions you have provided in your previous post??? OR is there a different procedure to overcome this problem. Please help me, i like this smartphone(lenovo P780) so much that i don't want to switch on to another smartphone.
Regards,

Install mobileUncle Tools from GooglePlay.
Open the program.
Under Engineer Mode\Engineer Mode (MTK)\ BandMode\ you will find Sim 1 and Sim2, where you can see what bands are availlable. GSMMode (2G) and WCDMA (3G).
This is it. You can not add other band.
As I know, the chinese model ( mine also)has only WCDMA2100 ( on mobileUncle is WCDMA-IMT-2000). I need WCDMA -GSM 900 but ...it is not possible. It is not a software but hardware issue.
There are 2 versions of P780. One with 4G storage with WCDMA 2100, and one with 8G storage with WCDMA 900&2100 .

Thank you!
Thanks a lot, Now i regret buying this phone to be used in my country!

Please help
i have install root acces on my chinese p780
But i have problem when i try to install v51 modem for my sim card 2 to work in romania.
i have installed twrp manager and granted super user acces.
on my sd card i put the V51+s820.zip file
When i enter TWRP manager / INSTALL / External SDcard / select V51+s820.zip and then when i slide to install the device rebot into Android system recovery 3e and i dont know what to chose... i chose apply update from sdcard and sdcard2 then the android logo of installing apear for 1-3 minute (and i dont see anthing installing) and then the decive reebots.
Please help.. i dont know how o do it..

You already have the answer with what you do wrong, on the romanian forum.

install modem driver to P780
Hello!
I need some help. I've bought a Lenovo P780 phone and when I put in my SIM, I realized there is no signal and the phone can't connect to the network. After some advices I tried to install modem drivers. I downloaded the drivers from badmania98's upload. I copied them to the phone internal memory (tried with SD card too, with no result). I started TWPR manager (tried with mobileuncle too), pressed install, selected one of the unzipped pack, eg. v52 Modem_P780_V52.zip. Slide the slider, my phone reboot, I got the system recovery. I choose apply update from sdcard (or sdcard2 from external SD card) and choose my zip file. My output is:
-- Install /sdcard ...
Installation aborted.
Neither of zips work. What should I try? Did I miss something?
Thanks
Daniel

I need some assistance please.
Hello badmania I am in need of some assistance from you please. I bought my Lenovo P780 and as I've seen and heard, people are having bad signal quality. I was looking online trying to see if there was a way to solve this problem. I ended up on this website and saw your steps on how to do it, but honestly I have no idea what I'm doing. I was wondering if you could sort of guide me through the process please. I would really appreciate it.
Thanks,
Moises

Hey. I have the same kind of problem (chinese Lenovo P780, trying to use it in Hungary with a GSM 900 / 1800 provider) but the weird thing is that the phone loses signal occasionally. I mean if I check the phone, about 7 times of 10 there is no signal. I tried out a lot of modems (found on a russian blog) then I tried out the modems posted in here, but it's still the same. I checked the settings in engineer mode and everything is turned on. Please tell me what is going on.

nandude said:
Hey. I have the same kind of problem (chinese Lenovo P780, trying to use it in Hungary with a GSM 900 / 1800 provider) but the weird thing is that the phone loses signal occasionally. I mean if I check the phone, about 7 times of 10 there is no signal. I tried out a lot of modems (found on a russian blog) then I tried out the modems posted in here, but it's still the same. I checked the settings in engineer mode and everything is turned on. Please tell me what is going on.
Click to expand...
Click to collapse
I have the same problem I'm sending the phone back to the store and asking for a replacement.
I had another P780 2 months back (dropped into water} and there was no such problem.

[HOW-TO][E SS/DS]*UPDATED*Workaround for problems to save APNs manually on ICS ROMs

As most users already know, there is a bug in the dual-SIM ICS FTF if you flash it on Xperia E, not being able to manually save APNs. Infact, not being able to create them at all.
Well, I had this and fixed this problem on xmoose's XBoosT ROM , but since its based on the stock ICS firmware, it'll work for it too.
Here's what you want to do to fix it :
METHOD 1:
Disable 'Data Transfer" : Go to Settings > (under Wireless and Networks) More.... > Mobile Networks > UNTICK 'Data Enabled'
Go Back, and turn ON Airplane Mode
Wait till its completely turned on
As soon as its turned on, turn it back OFF
Now go set up your APNs!!
Hit the THANKS !!
P.S : I believe the bug was because the ROM could not detect the MCC and MNC port numbers of your respective carrier. But this fixes it. Weird.
UPDATE: Looks like this bug exists in the Dual SIM variant too. To fix it on DS phones, follow these: OK, it seems the bug isn't device-specific. Just try either method (if Method 1 doesn't work, try Method 2)
METHOD 2:
NOTE: You'll need a working Wi-Fi network with for this!
Connect to any Wi-Fi network
Go to Settings > Dual SIM card > Untick SIM 1, and then tick it back again
Go to Settings > Xperia (TM) > Internet settings
The APNs should get downloaded and be working!
(Thanks to @TheRealSS for Method 2)

Will try this,if you are sure it works,let @UltraGamerHD note this in his Official thread under "How To"

NeoTrix said:
Will try this,if you are sure it works,let @UltraGamerHD note this in his Official thread under "How To"
Click to expand...
Click to collapse
Will Do!

KDB223 said:
As most users already know, there is a bug in the dual-SIM ICS FTF if you flash it on Xperia E SS, not being able to manually save APNs. Infact, not being able to create them at all.
Well, I had this and fixed this problem on xmoose's XBoosT ROM , but since its based on the stock ICS firmware, it'll work for it too.
Here's what you want to do to fix it :
Disable 'Data Transfer" : Go to Settings > (under Wireless and Networks) More.... > Mobile Networks > UNTICK 'Data Enabled'
Go Back, and turn ON Airplane Mode
Wait till its completely turned on
As soon as its turned on, turn it back OFF
Now go set up your APNs!!
Hit the THANKS !!
P.S : I believe the bug was because the ROM could not detect the MCC and MNC port numbers of your respective carrier. But this fixes it. Weird.
UPDATE: Looks like this bug exists in the Dual SIM variant too. To fix it on DS phones, follow these:
NOTE: You'll need a working Wi-Fi network with for this!
Connect to any Wi-Fi network
Go to Settings > Dual SIM card > Untick SIM 1, and then tick it bak again
Go to Settings > Xperia (TM) > Internet settings
The APNs should get downloaded and be working!
(Thanks to @TheRealSS for the fix for DS)
Click to expand...
Click to collapse
thank you. it works.

KDB223 said:
As most users already know, there is a bug in the dual-SIM ICS FTF if you flash it on Xperia E, not being able to manually save APNs. Infact, not being able to create them at all.
Well, I had this and fixed this problem on xmoose's XBoosT ROM , but since its based on the stock ICS firmware, it'll work for it too.
Here's what you want to do to fix it :
METHOD 1:
Disable 'Data Transfer" : Go to Settings > (under Wireless and Networks) More.... > Mobile Networks > UNTICK 'Data Enabled'
Go Back, and turn ON Airplane Mode
Wait till its completely turned on
As soon as its turned on, turn it back OFF
Now go set up your APNs!!
Hit the THANKS !!
P.S : I believe the bug was because the ROM could not detect the MCC and MNC port numbers of your respective carrier. But this fixes it. Weird.
UPDATE: Looks like this bug exists in the Dual SIM variant too. To fix it on DS phones, follow these: OK, it seems the bug isn't device-specific. Just try either method (if Method 1 doesn't work, try Method 2)
METHOD 2:
NOTE: You'll need a working Wi-Fi network with for this!
Connect to any Wi-Fi network
Go to Settings > Dual SIM card > Untick SIM 1, and then tick it back again
Go to Settings > Xperia (TM) > Internet settings
The APNs should get downloaded and be working!
(Thanks to @TheRealSS for Method 2)
Click to expand...
Click to collapse
dude i followed each and every step and it would work for the time being but after just one reboot the prob comes again all my apn accounts r gone but able to revive by following this procedure again and again. cant there be any permanent fix for this problem.

aahanable said:
dude i followed each and every step and it would work for the time being but after just one reboot the prob comes again all my apn accounts r gone but able to revive by following this procedure again and again. cant there be any permanent fix for this problem.
Click to expand...
Click to collapse
ya.. even for me after first reboot the apn disappeared but still I could connect to the internet. after some reboots (didn't count) the apn reappeared all by itself !
EDIT : now my phone saves the apn's sent as a msg from my operater. this wasn't working before ¿¿

smz2014 said:
ya.. even for me after first reboot the apn disappeared but still I could connect to the internet. after some reboots (didn't count) the apn reappeared all by itself !
EDIT : now my phone saves the apn's sent as a msg from my operater. this wasn't working before ¿¿
Click to expand...
Click to collapse
Well, atleast its working now...wasn't that the whole point?

[HOW TO] Force 3G (WCDMA) use.

There are some roms that does not allow the "3g only" option, especially kitkat-based custom roms. This can make you lose your mind to find a solution or even uninstall the rom, but you can easily solve the problem.
NO ROOT REQUIRED
--------------------------------------------------
1 - Open Dialer
2 - Type *#*#4636#*#*
3 - Open Phone information
4 - Scroll down and find Set preferred network type
5 - Choose WCDMA only
6 - Return to home and you are good to go!
--------------------------------------------------
You need to set everytime you boot your phone!

gersbandeira said:
There are some roms that does not allow the "3g only" option, especially kitkat-based custom roms. This can make you lose your mind to find a solution or even uninstall the rom, but you can easily solve the problem.
NO ROOT REQUIRED
--------------------------------------------------
1 - Open Dialer
2 - Type *#*#4636#*#*
3 - Open Phone information
4 - Scroll down and find Set preferred network type
5 - Choose WCDMA only
6 - Return to home and you are good to go!
--------------------------------------------------
You need to set everytime you boot your phone!
Click to expand...
Click to collapse
Hi. When I use this code on my Asus Zenfone 4 (A450CG) the Phone Information section is not visible. Is this normal?

force 3g
This does not work on LG G3 Lollipop 5.0 Software Version V20h-234-10. Is there any way to force 3g on Lollipop?

I found a solution how to force 3G on Lollipop 5.0
Ive downloaded Toggle Network Type 5.0 apk.
It works for me

[Q] [Lenovo] [MT6572] No signal , formated nvram!

Hello xda
first, i searched the forum and other sources for solution and didn't found any help
-My phone is Lenovo A319 dual sim
-i download the latest stock firmware for it from 4PDA
-then before flash i select the scatter in sp flash tool and did format all except bootloader.
-then flashed the firmware and everything done well.
-after powering on my phone with sim card it didn't recognize it (Both sim 1 and sim 2) - no imei - no serial number - baseband is ok.
-i fixed all of this and after some tries the phone recognize both sim(s) but just 1 bar signal in sim 2 (2G) out of 5
-and sim 1 keep doing searching and no service and randomly get network (G) and sometimes (3G) but can't make calls, ussid ... etc
*Things i have tried*
1-fixed imei with SN & IMEI Writer. (Done!.)
2-fixed SN with Maui META 3g and ini config file that i have found on the internet that supposed to fix 3g but it only fix SN:nullnull to SNNxxxxxxxxxx (where x is some letters and numbers). (Done!.)
3-flashed another secro.bin from another MT6572 device(original secro.bin from stock firmware a319 flashed already). (No Luck with network)
4-changed TX settings in RF Tool in Maui META 3g [ GSM900=TX:-13 - 1800=TX:-10].(No Luck with network)
5-some other playing in Eng. Menu (*#*#3646633#*#*).(No Luck with network)
Notice:
-firmware i have downloaded has a folder Called "APDB" that contains database files for my device and a file called "catcher_filter_1_wg_n.bin".
-firmware dosn't have nvram.img.
-i have no backup.
-i'm sure that is the problem can be solved by changing band settings in Maui META 3g in RF Tool but i have no idea how to accomplish such thing.
-i guess the problem i because the firmware is Russian and my phone work in Egypt so the band settings is vary from here to there.
i hope i can get some help, and sorry for my bad english
BR.

i found a stock rom for lenovo a319 that sim works with my sim perfectly.
now i want to move from stock to CM12.1.
cm12.1 has the same issue because of modem things.
-how can i change modem from the stock i have to work with Russian unofficial CM?
Update
after flashing cm 12.1 the signal gone again, when i try go back to it no signal too :\

bump!
iguess The Problem is in RF Data but i have no idea how to set it correctly
any help?

please tell me where you find the solution for sn repair, please pm it to me
privatezs said:
Hello xda
first, i searched the forum and other sources for solution and didn't found any help
-My phone is Lenovo A319 dual sim
-i download the latest stock firmware for it from 4PDA
-then before flash i select the scatter in sp flash tool and did format all except bootloader.
-then flashed the firmware and everything done well.
-after powering on my phone with sim card it didn't recognize it (Both sim 1 and sim 2) - no imei - no serial number - baseband is ok.
-i fixed all of this and after some tries the phone recognize both sim(s) but just 1 bar signal in sim 2 (2G) out of 5
-and sim 1 keep doing searching and no service and randomly get network (G) and sometimes (3G) but can't make calls, ussid ... etc
*Things i have tried*
1-fixed imei with SN & IMEI Writer. (Done!.)
2-fixed SN with Maui META 3g and ini config file that i have found on the internet that supposed to fix 3g but it only fix SN:nullnull to SNNxxxxxxxxxx (where x is some letters and numbers). (Done!.)
3-flashed another secro.bin from another MT6572 device(original secro.bin from stock firmware a319 flashed already). (No Luck with network)
4-changed TX settings in RF Tool in Maui META 3g [ GSM900=TX:-13 - 1800=TX:-10].(No Luck with network)
5-some other playing in Eng. Menu (*#*#3646633#*#*).(No Luck with network)
Notice:
-firmware i have downloaded has a folder Called "APDB" that contains database files for my device and a file called "catcher_filter_1_wg_n.bin".
-firmware dosn't have nvram.img.
-i have no backup.
-i'm sure that is the problem can be solved by changing band settings in Maui META 3g in RF Tool but i have no idea how to accomplish such thing.
-i guess the problem i because the firmware is Russian and my phone work in Egypt so the band settings is vary from here to there.
i hope i can get some help, and sorry for my bad english
BR.
Click to expand...
Click to collapse
please provide a link it would be helpful

Any solution? Since my Lenovo A319 has the same problem. Sometimes no network, EDGE, 3G or even H+. Hopefully someone already have the solution.
I'm in Indonesia, already using A319_ROW_DS_S318_150615 with Baseband Version MOLY_WR8_W1315_MD_WG_MP_V43_P2_2015/01/13

AbuIgras said:
Any solution? Since my Lenovo A319 has the same problem. Sometimes no network, EDGE, 3G or even H+. Hopefully someone already have the solution.
I'm in Indonesia, already using A319_ROW_DS_S318_150615 with Baseband Version MOLY_WR8_W1315_MD_WG_MP_V43_P2_2015/01/13
Click to expand...
Click to collapse
hello
iam not an expert but i had some problems the same way with 3g and gsm by seeking some infos in this fourms and others
i found that u can easly extract ur device modem data base by the following command "under adb "
" adb pull /etc/mddb C:/adb " notice that c:\adb is going to be the extraction destination
so u v just got ur own modem database
easly i guess u can extract similar working device modem and just go to Maui META v 9.1604.02.00 then load it there and apply it to ur own device by selecting Rf and then 3g settings also change ur imei to ur original ones
---------------
i hope that i'am saying a good and useful stuff or some one can correct the mistakes 4 me
** sorry that i was here for long time just learning without trying to give or share i hope that one day i will have some info to share..

dial *#06#.. if you got invalid imei, then...write down your both imei (you can see at the back of your phone) download and install chamelephon, open and write down both imei. apply and restart your device. enjoy

How to lock band of LTE ?

Hi
I have jio sim
I m on moluntics debloated rom v1
The lte band currently is 5
How can I make it to stick to band 40 only.
Regards

web-9g2Ifw said:
Hi
I have jio sim
I m on moluntics debloated rom v1
The lte band currently is 5
How can I make it to stick to band 40 only.
Regards
Click to expand...
Click to collapse
i dont know if it works or not, but in samsung stock rom..usually the lte band is changed from service mode.

The service codes such as *0011# than entering Q than 0000 etc only work on or before Lollipop, you can try if that ROM is Lollipop (I have J7 2016). I also wanted to change Jio band but no solution.

Me_Ashish_ said:
The service codes such as *0011# than entering Q than 0000 etc only work on or before Lollipop, you can try if that ROM is Lollipop (I have J7 2016). I also wanted to change Jio band but no solution.
Click to expand...
Click to collapse
code is working but method is not working in my samsung galaxy j7 marsmallow version.

I found this in the j7 group
Hunny Malhotra:
so guys here it is how you can change lte bands on samsung j7 for better speed in jio..
step 1 - first download nd install
"SHORTCUT MASTER LITE" from play store..
step 2 - then open it nd go to secret code explorer above on right side.
step 3 - then select system apps under options nd scroll down.
step 4 - go to code "2263" click on it and press "launch 0"
step 5 - then u ll reach service mode nd see stack 1 nd stack 2 there.
step 5 - go to stack 1 ( if jio in port 1)
nd go to band disable.
step 6 - select lte there nd disable band 5.
step 7- then press back 2 times above on right.
step 8 - then go to band selection nd open lte/gsm/tds/auto mode.
step 9 - now select band 40 as preferred nd close it.
here u go..
but speed depends on others factors too coverage in ur area..or u already on same band etc.
but still u ll get almost double speed what u r getting rightnow..
u can also disable band 3 but that might result in lost of networks in case u r in poor network area.
Hunny Malhotra

messi2050 said:
I found this in the j7 group
Hunny Malhotra:
so guys here it is how you can change lte bands on samsung j7 for better speed in jio..
step 1 - first download nd install
"SHORTCUT MASTER LITE" from play store..
step 2 - then open it nd go to secret code explorer above on right side.
step 3 - then select system apps under options nd scroll down.
step 4 - go to code "2263" click on it and press "launch 0"
step 5 - then u ll reach service mode nd see stack 1 nd stack 2 there.
step 5 - go to stack 1 ( if jio in port 1)
nd go to band disable.
step 6 - select lte there nd disable band 5.
step 7- then press back 2 times above on right.
step 8 - then go to band selection nd open lte/gsm/tds/auto mode.
step 9 - now select band 40 as preferred nd close it.
here u go..
but speed depends on others factors too coverage in ur area..or u already on same band etc.
but still u ll get almost double speed what u r getting rightnow..
u can also disable band 3 but that might result in lost of networks in case u r in poor network area.
Hunny Malhotra
Click to expand...
Click to collapse
It needs root access?

not working
Not working in j7 marshmallow