My thesis to get a phone.

Now, I'll give some context for the people who are reading and are not part of my family. I had to finish recording a video for a Trinity guitar grade. If I managed to do so before the 28th of February, my dad promised me a new phone. And I had done my part of the deed. Now, I have to present a thesis on why I should get the phone.

Why should I get the phone?

How will I use the phone?

Why shouldn't I invest the money instead of getting this phone?