Please!!!!! Help me!!!!! Urgent!!!! - Android Q&A, Help & Troubleshooting

It would be so good of any one of you to help me for this problem;
Recently, using SP Flash Tool, I accidentally chose the "Format All + Download" option when flashing a ROM to my Lenovo A850. I managed to flash the ROM but the biggest failure is, I cannot call and use data connection. I also have an error called "NVRAM Warning: Err 0x10" at the Wi-Fi section. At my notification bar, it shows "Invalid IMEI".
My phone is Dual SIM.
I somehow managed to fix my lost IMEIs by entering EngineerMode. After fixing and rebooting my phone, my notification bar showed "Emergency Calls Only" but I placed a working SIM in my phone. I still could not call and use data. I am sure that I lost many important things (MAC Address, IMEI, NVRAM, etc.) when I formatted my phone using SP Flash Tool.
I am clueless on how to fix this problem. I don't know what I should do. I just want my phone to be able to call. If not my Lenovo A850 is useless. I am so frustrated now and I am so scared.
If any one of you are able to help me, PLEASE NEVER HESITATE TO HELP ME. This issue is so serious that it doesn't let me to have a peace of mind.
PLEASE I BEG YOU DON'T IGNORE THIS PLEASE!!! Thank You for your kind attention!

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Hi !
In order to fix the "Invalid IMEI", you have to :
Dial *#*#3646633#*#* then go to "Connectivity -> CDS Information" then click on "Radio information" then if your phone is dual SIM, press Phone 1.
In the textbox with writen "AT+" click on it then select AT+EGMR=1,7,"" and between the quotes, write your IMEI 1 number.
If you have an error "This command is not allowed in UserBuild", simply add a space between EGMR and AT+.
It will look like that : AT+EGMR=1,7,"YOUR IMEI HERE"
And for the NVRAM error, simply follow this guide : https://forum.xda-developers.com/showthread.php?t=2730486
Have a good day !

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Hi! Thanks For the Reply.
SharkEzz said:
Hi !
In order to fix the "Invalid IMEI", you have to :
Dial *#*#3646633#*#* then go to "Connectivity -> CDS Information" then click on "Radio information" then if your phone is dual SIM, press Phone 1.
In the textbox with writen "AT+" click on it then select AT+EGMR=1,7,"" and between the quotes, write your IMEI 1 number.
If you have an error "This command is not allowed in UserBuild", simply add a space between EGMR and AT+.
It will look like that : AT+EGMR=1,7,"YOUR IMEI HERE"
And for the NVRAM error, simply follow this guide : https://forum.xda-developers.com/showthread.php?t=2730486
Have a good day !
Click to expand...
Click to collapse
Hi. Thanks for your help. I fixed NVRAM and IMEI. But still, I cannot call and use data even after I fix IMEI and NVRAM. The notification bar shows "Emergency Calls Only". I have inserted a working SIM Card but it is not being detected.
How will I get my phone to call?
Thank You very much!

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Maevinarsh said:
Hi. Thanks for your help. I fixed NVRAM and IMEI. But still, I cannot call and use data even after I fix IMEI and NVRAM. The notification bar shows "Emergency Calls Only". I have inserted a working SIM Card but it is not being detected.
How will I get my phone to call?
Thank You very much!
Click to expand...
Click to collapse
Hi to fix that correctly , first root your device but fbefore that enable USB Debugging :
1. You can use KingRoot.apk , this one work for me if it doesn't work for you search for iroot.apk or frama-root.apk or some other.
https://kingroot.en.uptodown.com/android
2. Download SN Write tool ( we will use to put our Original imei number ).
https://snwritetool.com/download/sn-write-tool-v1-1752
3. Download MTK droid tool 2.5.3 (we need for restoring nvram backup) .
https://androidmtk.com/download-mtk-droid-tool
4. Download nvram backup for your device A850
https://mega.nz/#F!CQ1jjZSb!3wlZPapiIuRTuiqVWt4jKg
5. adbd Insecure v2.00 (install app just in case if your device is not recognized in MTK droid tool)
https://forum.xda-developers.com/sho....php?t=1687590
7. BusyBox.apk (install app just in case if your device is not recognized in MTK droid tool)
https://busybox.en.uptodown.com/android
Once you do that run adbd Insecure v2.00 app and check enable insecure adb now connect your phone on pc and run MTK droid tool , if is your device recognised press root to grant SU rights for root shell and click on OK.
now click on IMEI /NVRAM now click just on Restore choose nvram file which you downloaded put .bin file .tar file ignore and click on Reboot.
Now it should be working again .
To restore your Original imei , run SN Write tool go to System config check IMEI and check IMEI dual if your phone support dual sim and now load:
Modem DB and AP DB from data base folder which you can find inside your stock firmware make sure you don't make mistake by puting AP on MD1_DB or Modem DB on AP_DB click on Save now click on START , now you will see popup , write there your original IMEI 15 digits numbers click OK , take out the battery from your phone and put back now plug your device .
Once the process is finish you will See PASS your device will reboot and when is finish just exit from SN writter tool .
Follow this video if is easy for you :
https://www.youtube.com/watch?v=4uSxXFbzhZs
Good Luck