I regularly recharge my mobile phones with bitcoin. There are services both online and offline that help with this. I have also pay my school fees with bitcoin through an exchanger before! Cryptocurrency is highly liquid in my country and people believes cryptocurrency is better than fiat! There are many service providers accepting cryptocurrency!
Spending crypto from mobile phone is very easy nowadays indeed.
May i know what wallet you are using in your phone ? Many people using trust wallet like me.
I usually spend crypto with my trust wallet to buy and sell cryptocurrency, and of course for profit.