How can I amplify my weak phone signal? We have a holiday cottage in Cornwall and with no phone connection. We have no plans to have one installed, as we are not there very often. I bought an O2 wireless hotspot module for mobile Internet access but the signal at the cottage is very weak so it is largely unusable. It works well elsewhere, though. Is there anything I can do to amplify the phone signal? O2 have been no help. Mobile phone repeaters are available but they are illegal to use in the UK and with the threat of a fine of £5,000 and up to 51 weeks imprisonment I strongly advise against it. It appears that O2 has no plans to improve coverage in your location, however, it may be possible to use one of the other mobile phone networks. Ask friends and neighbours to try their phones at your cottage. If they get a decent signal find out which network they are using and get your hotspot device unlocked. This will let you use any network; you can test the connection with a pay as you go (PAYG) SIM card, though you may want to sign up to a contract tariff if you plan on downloading a lot of data. Unlocking usually costs around £5 to £15, it only take a few minutes and can be carried out online or in many high street mobile phone accessory shops.