Desktop computer whenever possible, then laptop, and only phone if there's no other ready option.
For me, typing on a phone is a crock of s**t. Too many typos, too many times accidentally causing the phone to do something bizarre.
Give me an original 101 key keyboard. That's about the only thing I can type on fast enough, to not lose my train of thought before I can get it entered. I've actually had younger people who were almost afraid of how fast I can type on an old-style keyboard. I'm like a snail, on a phone, though. Maybe it will get better the more I type on the phone- but I've had quite a few years to get acclimatized to them, and it's still a struggle...
Regards,
Gordon.