iGR has released a study demonstrating over half of kids aged 12-14 have a mobile phone to call their own, reports eMarketer.

The study also shows a good portion of those under ten have phones. Marketing penetration in that segment is not as strong as it is for older children, so that group may become a savory target for mobile operators.

Tweens, youth ranging in age from 8-14, who own a mobile device said keeping up with friends was their primary concern. Checking in with parents came second. Peer pressure also accounted for ownership.