Can Xiaotian be a backup machine?

Yes, the advantage of little genius as a backup machine is that:

Waterproof, can withstand the basic water shower, convenient for me to go out and come back to wash.

You can talk in two directions (the watch can be set to answer automatically), monitor in one direction, let the watch ring forcibly, and call the dog three times.

The SMS received by the watch can be viewed in the app! Even if the card used for this watch is a little useful, at least the verification code will not be lost because I don't have my watch!

You can transfer incoming calls (I'm not sure if it's because I set the transfer when I was on another mobile phone before, or if this watch doesn't answer, it will automatically transfer to the set mother number, and the result is the same anyway)