My phone keeps dropping off the the internet. Router us ok and booster ok.

[Lindarmac]

For the past 3 days my phone has been dropping off the house internet. This has meant I've used a lot of data and had to roll over a lot of my saved data.  It has been fine in my shop which is very local and is virgin broadband and it stayed on the internet in my local restaurant last night.  I've rebooted everything. This is getting very frustrating and I'm using a lot f my data as I said 

[Highlinder]

@Lindarmac  Do you notice any changes in the lights on the router when this happens?