Trick how to solve Sony Xperia M4 Aqua Dual if its stuck in boot loop 

This video will show you how to start Sony Xperia M4 Aqua Dual if its stucked in restart loop.
This problem is badly effected lakhs of users who had upgraded their devices with latest OS firmware Marshmallow and Sony Cellphone company seems not caring about their customers.
This problem seems some hardware issue done by softwares provided by SONY communications.
No doubt sony was the best and providing rich quality of phones and softwares but here they seems irresponsible.
I hope someone here can provide us permanent solution for this issue.
Share with your friends so any effected person may get his device alive.