To stop battery drain in marshmallow

The only foremost reason for the battery drain in marshmallow is the cellular signal

I am using an android one (micromax) and after the update from lollipop to marshmallow my phone is

1. Randomly reboots when I am using it ,when its in charge and also in standby!

2. Next comes the battery drain problem, after the update i saw my battery draining even in standby, i don't know why but few days before i saw that the main reason for the battery drain is not some app its the*cellular signal and WIFI* first of all there is no great way than airplane mode to get rid of cellular signal.

So i used the airplane mode and now there is no battery drain in standby and also it drains less battery on usage of the device without cellular signal so till the google fixes the issue the only way to have the battery stop draining is to put the device in airplane mode

Thats all guys if you have any comments or suggestion let me know. I think this article helped you