No Indoor Mobile Signal

[CMCMANN]

Me and my wife just moved to Plymouth, into a 2 bed semi-detached at PL7, the house was old so we had the insulation redone but now the Three signal inside isn't working. I spoke to customer service at Three who told me I should have excellent coverage, BUT there is none inside and I am at my wits end, I work for myself and have to go outside to have a decent conversation when customers call. I did some research on the Ofcom site, it brought me to a list of legal solutions, I tried the first one, Cel-fi but it was over a thousand pounds, I then tried the other company Ofcom listed called Huaptec, these were in Germany, but thankfully they sent me to a supplier in the UK. The problem is the cheapest cost is still over £500.  Has anyone had any experience with using this brand of mobile signal boosters, will it work in a 3 bed semi? The house is about 100m square, has some open plan downstairs but not upstairs.

I really need it for business, I have a home office downstairs, off from the kitchen, that 100% needs coverage, ideally I need to be able to make calls around the kitchen & our main bedroom upstairs. Does anyone know if these will work as well as they promise, it says up to 1500 sq feet? There is a money back guarantee for 2 weeks so I should be able to get it tested within the 2 weeks, but it is a lot of investment in time and as well as the money...anyone have any experience? 

[Hawkeye]

HiI know this is late in the day,  but I have just seen your post.  

The Nextivity Cell-Fi repeater works very well,  I live in BN18 in an old coach house with no signal. I installed a G41 and got excellent service on Three.  I know it was expencive,  over the long term,  cost over the 3 years, it has been worth the cost.  £1000 seems a little steep.  There is a company called Frequency that can provide the system for you. 

[Hawkeye]

https://www.frequencytelecom.com/search.php?search_query=C41

[Geluk]

Suggest you look for an external 4g or 5g router to solve issue; sounds like

new insulation is with foil sheet, thus forming a Faraday cage 😞

https://www.ebay.co.uk/itm/231739559584?_skw=external+5g+router&itmmeta=01J9NRVY3HD7P80X7XBHYF34X8&h...

https://www.amazon.co.uk/KUMA-CONNECT-PRO-4G-Wifi-Router/dp/B097RBBS8S/ref=sr_1_26?crid=31CAKWW9SSNQ...