How can I read my text messages from another device?
Remote Control? Hmmmm. 

AIRDROID!


Airdroid is an app that allows relative remote control of a device, remotely.
Install it on the 5x, and make sure you create an account. Y'all be needing it. Also, tap the menu, then settings, and disable the confirmation for lite mode and enable keep-awake*
On the other device, go to and bookmark web.airdroid.com DO NOT LOGIN YET!
Disconnect from WiFi on your 'other' device, and in the 5x too if you want. Then, login on your other device.
If all goes well, it will connect to your phone, no issues! Just tap 'messaging' in the corner, and you are done!


*You may need to enable Developer options (Settings -> about phone tap build number 7 times, then back, then pick the new options) and pick stay awake while charging (tick it!) Also, Airdroid is battery consuming, so keep it on charge!