Wbackup - Wataniya

A while back, Zain had launched a similar service to back up your mobile information (Zain-Mobile Back up). And of course, now we have one from Wataniya as well.

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WBackup lets you save not only your contacts,but also your calendar, SMS, MMS, photos, and videos. So whether you lose your mobile or get a new one,you can restore all your data with the press of a button.

How to get this service:
SMS "BACKUP" to 1618 and get 3 months free subscription today

Link

Personally, I prefer to have a back up on my laptop and on my flash drive. But that's just me. Anyways, it's always good to have more options.