No-one wants to move home or switch to a new mobile provider only to find they have next to no signal.
But if you are having coverage problems, don't be tempted to try and boost your signal with an illegal mobile repeater - because if you do, poor reception could be the least of your problems.
The unlicensed use of mobile repeaters could result in a fine of up to £5,000 and up to a year in prison.
Unfortunately, a number of websites still try to pass these devices off as a legitimate solution to signal problems.
Some even claim these devices - which are also described as mobile phone signal boosters or enhancers- are exempt from Ofcom's regulations. Don't be fooled. They are not.
It's for this reason that you won't find these particular devices for sale in the High Street or through your mobile phone company.
As with any online purchase, check the website's credentials - the website should give a name, address and contact number of those running it. Some addresses are a façade and phone numbers are redirected. Even if the domain name or e-mail address ends with '.uk' it may still be based abroad making it more difficult to seek redress in the event of a problem.
The use of these devices - many of which originate from suppliers in the Far East - can cause serious interference problems.
If in doubt contact your mobile network operator, they should help you find a legal solution.
For advice about coverage or signal strength, always speak to your mobile provider first.