Caller ID used to be a phone perk; with cell phones, and now smartphones, however, caller ID is a basic part of the package. That said, in order for caller ID to be useful, you need to be looking at your phone. Unless you assign specific ringtones for all of your contacts, you won’t know who’s giving you a ring without going over to your Android.
Luckily, there’s an easy way to tell Android to announce out loud who’s calling. That way, you’ll know whether it’s a call worth taking, no matter where you are in relation to your phone.