Business smartphone for a copywriter / smm manager - what to take?

Question

Copywriting

I'm thinking about what is better to take for work on the road, so to speak: a tablet with a keyboard case or a large smartphone? On what operating system? The main requirement: the convenience of working with office programs, Skype for communication, so that the mail opens normally. Do not offer laptops and netbooks - I am a fragile girl, I will not drag it far. Now I use the phone on Asha when there is no access to the computer - and damn it!