Meizu problem

1200

3

2016-12-23 10:09

Hello, please help me.
In order increase Jio speed I changed my phone LTE band to 40 only in engineering mode according to a tutorial.
But now I am getting imei null, radio off,  GSM baseband unknown. Tried many things, please help me. My network are not working.I took my phone recently by saving pocket money.
Please anyone help.