[Cobbydaler]

LTE based mobiles could cause interference:

The crucial bandwidth at the centre of the issue is 800Mhz, which will be used to bring in LTE, which will allow users access to the internet on mobile phones at 20 times current speeds. The frequency has also been seen as useful to bring mobile broadband to rural areas. However, tests found that some of the new high-powered mobile devices cause cable TV to disrupt, from pixellation to total loss of image. It has emerged that the European standards for a cable TV box shielding and wiring insulation were not set at a strong-enough level to prevent interference from LTE mobiles.

Link