Android phones, apps and tablets

This is awesome: https://play.google.com/store/apps/details?id=com.zegoggles.smssync

SMS Backup +

Backs up your SMS, MMS, and call log into labels within Gmail, and can also create calendar entries in your Google Calendar for every call you've made.

Effectively you can't lose that stuff (whereas today it's the only thing you can lose), and it does it in a way that makes it really useful (such as me seeing when I called the lawyer in my calendar and having Google Search in Gmail and Google Calendar find stuff for me).

Just a note for anyone who might be using this - it currently can't restore sms on kitkat, seems to have been an issue for them for a while looking at their github.