This is only for Guardian Watch device
Step A) Login to my.nuttag.com.au
Step B) Enable SMS notifications and provide phone numbers in "Sms alerts"
Step C) Click on SETTINGS tab. Untick box "Sync phone numbers to device", then add phone numbers + contact name
Step D) Hit "Apply" to save all the numbers. Once saved, all numbers will sync in the watch, under "Contact or Phonebook".