[EMMANUS]

If you get Modem assert error on your itel or any other spreadtrum phone, error message looks  like this https://uploads.tapatalk-cdn.com/2018012...bfb0f5.jpg

It most likely occured because you flashed the phone with a firmware that has incompatible modem and nv files. It has been known to occur on some phones after flashing the touchpad fix firmware Itel 1508 (Itel_IT1508_C160_TSL_111_1107_Touchpad_Fix) from here https://www.hovatek.com/forum/thread-2194.html .

The solution is
1) Flash this firmware Itel 1508 (Itel_IT1508_C160_IN_20160330) from here  https://www.hovatek.com/forum/thread-2194.html , make sure you flashed all the nv and modem files, you can learn how to do that here https://www.hovatek.com/forum/thread-28774.html

2)Re-flash Itel 1508 (Itel_IT1508_C160_TSL_111_1107_Touchpad_Fix), but this time, untick all nv and modem files.

3) When flashing is complete and phone boots, the error should be gone and your phone should be able to get a network signal.
Note: You may need a hardware dongle or box to complete this easily

[lolvatveo]

there is no latest ROM on the net, so flashing the old version will cause a black screen. I was at the service center because I flashed the old rom, theydon't give me rom. So is there any other way to delete modem old information.

[hovatek]

there is no latest ROM on the net, so flashing the old version will cause a black screen. I was at the service center because I flashed the old rom, theydon't give me rom. So is there any other way to delete modem old information.

You could create a pac file for such a task