[Q ] Invalid Sim card ( SM-G900P)

Hi.my phone is SM-G900P.it's has got error : invalid sim card.can you help me....thank

Invalid IMEI on Huawei Y330-U01 After Flashing Official ROM

Hi, I have a Bricked Huawei Ascend Y330-U01. MT6572 Chipset. After flashing the official ROM with SP flash tool, SIM card doesn't work anymore, i keep getting Invalid IMEI (null IMEI). I tried a different SIM, but didn't work.

And so i rooted the phone and:

1. --- Used MTK droid tool to write IMEI, but it didn't work. I keep getting "Changes would come into force after reset". I don't know what that means. Nothing happens after i reboot.

2. --- I also tried using MobileUncle.apk but it also doesn't work "AT command is failed to send"

3. --- I used *#*#3686633#*#* to enter into engineering mode and change the IMEI, but it also failed. "AT command is failed to send"

4. --- I also used imei.exe <IMEI_1> then pressed enter in command promt to generate MPB01_001 file which i placed in the /data/nvram/md/NVRAM/NVD_IMEI/ folder in the root directory but also doesn't work. "Got No Service". *#06# reveals a window with nothing written in it.

Honestly I'm frustrated and stuck. Searched almost all threads associated with invaild IMEI but couldn't find a solution. Please Help :angel:

invalid sim card

i have invalid sim card problem on y xperia z after lollipop update any help plz