Well personal I love to use my mobile phone for my studies as a teacher, because it is a lot more easier to carry around where ever I am going to.
I also prefer to use my phone for safety reasons, it's easy for you to put your phone in your pocket and no body with know that you are with some thing valuable rather than carrying a big bag with laptop always, to me it not proper because it's draws attention to the carrier.
Another reason why I do prefer using my phone to laptop is that it's is easy to subscribe the data for phone than that of a laptop where you will need a WiFi networks or hotspots and all of that.
Besides all of this, I also have some mobile app that helps me as a teacher like my online lesson plan and notes and they are so easy to operate with my phone, and are always with me wherever I go to and I can make reference to it without someone else knowing what I am doing.
MY PHONE TYPE
Well for now this is the best I can afford to buy, I hope to upgrade with time and by God's grace.
Name: OPPO A37m
Android Version: 5.1
Processor: Octa Core
Ram: 8gb
Rom: 128
Using my mobile phone makes my studies easier because I can carry it with me and as such I can always read any time I want to, it's a bit more easier and cheaper to subscribe to the internet data plan than the laptop and for safety purposes.
The only disadvantage I do have with using my phone before now is that it's affects my eyes especially at night, so I do use my glasses whenever am using it at night.
Well the little advice I have to give is that you use what you are comfortable with and also be mindful of the environment for safety reasons.