I've seen worse I think.
GetReligion: Communion most foul: How not to use a cellphone in a holy place
A priest had a standing order to have pizza delivered after a mass to feed to the congregants during the fellowship time that followed. He would be alerted to the impending arrival of the deliveryman by his cellphone. He wouldn't answer it, but it would ring and then he would send someone out to meet the deliveryman. This would frequently occur during the Eucharistic prayer.