This idea is very useful. Recently, a friend of mine moved his smartphone and lost everything. how to send your contacts to the googl cloud is well and in detail described here: http://poandroidam.ru/contacts/sinkhronizaciya-kontaktov-s-google.html. Good luck!
You need a gadget to receive notifications from your phone, measure steps, sleep, and possibly install third-party applications. Xiaomi redmi device