I have had the same WiFi for some time now and we have struggled with it in our house. The house is kind of long and spread out so getting WiFi everywhere is difficult. I had a NetGear R7000 router along with a couple NetGear extenders. I also had ATT DSL which was only about 20 mbps. This was fine a few years ago but with so much streaming and such no longer adequate.
Finally, my son came in for Christmas and he helped with some updates. We replaced the NetGear router with an ASUS ZEN WiFi AX Mini. It is a mesh system with a base and two other units. The change provided much better coverage all over my house. (Please, do not ask me what a mesh system is but it works great.) I could not have done this without my son who is very capable with this stuff. He works for a company where he is leading a group which develops computer games.
Next, I made the BIG move as I switched from ATT DSL to Xfinity Blast with 200 mbps. This was truly a large pain with many phone calls. I spent long time talking with someone that I could not understand and who did not understand. It was clear that when I asked a question, they repeated it back, looked it up in their book and then read the response. I finally found a better number and got things going. I required a new line pulled across the street and to the back of my house. I had the line pulled to the back of the house and then did the installation myself. I hate making up new Ethernet cables and plugs ins. Happily, I have all my cables in the house labeled.
Next, I switched my landline from ATT to Xfinity. This was also a confusing pain and little help from Xfinity. They initially give you some strange phone number and then you port over your old number. But I finally got it done and still have my old phone number.
Everything is working and the download speed is 10 times faster with upload 5-6 times faster. There is little difference in price. Everyone in the house is very happy.
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Two years ago, I started this process by changing my email address from a ATT based one to a Gmail account. It has taken a long time to get everything changed as the number of sites and places you have your email address are too many.
I was extremely upset with some of the Xfinity phone support with poor knowledge and heavy accents. However, the technician who came out to run the new cable was very nice. Some of the people I talked with were also nice but all of these were inside the US and genuinely seemed to care and want to help.