The telephone number 0114 303 5307 is a sales number used by Utilita Energy. Therefore if you have received a phone call from the number 0114 303 5307, unless that is you are thinking of switching your utilities provider.
Utilita provide energy and gas to UK homes and they often make phone calls out of the blue to make sales pitches. They have a variety of number which they make these calls from and 0114 303 5307 is one of them.
0114 303 5307 Utilita Mobile sales team
Utilita also operate a mobile service and they make sales phone calls from the number 0114 303 5307. Therefore if you receive a phone call from 0114 303 5307 you can be sure that this is a genuine call and not a scam.