It is against the law to read, write, or send messages on a cell phone or other portable wireless device. If your cell phone rings, do not answer the call or respond to the text message. Convictions for violations of this law are subject to fines.
You may use a cell phone to contact law enforcement, or during an emergency. If you must make a call, pull safely off the road and make the call. Try to keep the conversation short, or have a passenger make the call for you, if possible.
This law also applies to do any kind of activity in your cell phone as: Social media, Videos, notifications, chatting, etc.. Doing activities in the your mobile is the main problem in Texas roads.