I have had 150/150 mbps speed for about two years. I frequently work from home using a VPN and sometimes using LogMeIn app. Yesterday, my Internet speeds were significantly low...to the point that I could not do any work because the VPN and/or LogMeIn connection was soooooo slow. Also, frequently when my sister and her kids come over the Internet goes down. I have AT&T security system which relies upon the wireless signal for the cameras and system in general, plus a Smart 4K TV, plus using gaming systems, and ipad, iphone etc. I did the speed test yesterday it was incredibly slow....approximately 2-4 mbps dowload speed. I also use Alexa and have two dots plus Smart Things bridge and several wireless light bulbs.
I have a range extender (Almond) which will frequently lose the connection to Internet services. Is this a router issue (my router is a little over 2 years old -- Quantum). If I upgrade to a gigabyte plan, will that make a difference? I also ordered a new router.