Even if it's only used for utilitarian purposes, the care and feeding necessary if you land in a different country with a mobile phone is pretty high:
- find a SIM card shop
- research which card/plan meets your needs
- pay, screw around with it until you understand how to activate it
- in countries with weak infrastructure, spend lots of unplanned time finding a signal and waiting on slow data
- a quick internet search for bus routes or whatever often turns into standing on the corner for 45 minutes oblivious to everything around you.
- making sure to keep it charged, bring a backup power bank, etc.
- deal with reloading it with more money once the data runs out, which can often sink a few hours or more in remote places.
All that said, I'm still not giving up my phone the next time I travel but I do often resent the amount of time it takes to deal with one.