Mosque Jams Mobile phone calls

London Muslim has often been annoyed when praying in a Mosque only to be disturbed with the sound of a ringtone from someones mobile phone sounding.

Imagine my delight when I read that in Kenya they have discovered a device which jams the mobile phone signals preventing the phone ringing and disturbing prayers.

Can I urge all mosques where I pray in London to seriously consider introducing this device please.