I currently finance my cell phone (the phone only, this is unrelated to the service) from Apple

I currently finance my cell phone (the phone only, this is unrelated to the service) from Apple, through the iPhone Upgrade Program.  This program is essentially a 24 month interest free loan, through Citizens One.

I use my phone for Business (50% of the time).  Am I able to write off any portion of the monthly payments I make toward the phone?  Would I be treating this as a Communication Expense, or does the phone count as a Business Asset?