Those of us for who the mobile phone is the most important communication tool will know the problem of trying to use it in a home or office that cuts out signal quality and makes it difficult or impossible to use.
A recent survey by Vodafone found that one in five Brits have missed an important event or occasion because of a lack of signal, while one in fifty would even consider moving house to get a better cellphone signal indoors.
Many people now rely on their mobile phone, with some no longer having a fixed line phone.
For anyone who craves a better indoor signal, Vodafone has launched its Sure Signal box. Simply put, it plugs into a home broadband line and then allows up to four mobile phones to be used at once (32 can be registered to a single box).
Even those who can get an EDGE signal may not be able to access the high speed 3G network, so Sure Signal also improves speed.
A one-off payment from £50 (about $80) gets Vodafone customers the box, which is about the same size as the average home router.
