Okay, this might sound funny, I'm using Avast on my phone to give it a whirl. One thing I like about it is that you can have individual numbers on the block call register, compared to Trend you couldn't. I also like the feature of the uninstall feature. If you have Avast password protected, you can't uninstall anything unless you type the Avast password. That is what I like about the program.
What I don't like (this could just be my phone) is that when you have a scheduled scan, you have to have the phone on and in use and unlocked for it to run, compared to Trend it would run with the phone locked and the phone asleep.