Wi-Fi extenders improve the coverage area of your router, and in some cases they can provide additional Wi-Fi access points. If your home is too big for your router, there are a few things to consider before diving into the world of Wi-Fi extenders. For example, if you only want to maximize performance, it may be better to simply add Ethernet connections or additional routers to weak Wi-Fi zones. So visit these articles to have a good idea about home Wi-Fi
https://www.lifewire.com/best-wifi-extenders-4043312
https://www.pcmag.com/roundup/353474/the-best-wireless-range-extenders
https://www.colereview.com/best-wifi-extender/
Topic: Change ISP our router/modem. (Read 443 times)
is that possible if we change our ISP modem/router with manually,like we change our IP address?
I know the difference between a dynamic IP address and static IP address. On a wide area network (WAN) or local network (LAN) the my home assigns the IP addresses. 
How getting a new IP address? 
Here`s very simple method - disconnecting the power to your wi-fi modem. 
A good Modem Router i looking here http://jonsguide.org/best-top-modem-router-combo-reviews/. restart like turn on and turn off?
yes try it, you should get new ip. 
restart like turn on and turn off?
only isp can allocate ip for you, if you use dynamic ip you can try change it by restarting connection.
is that possible if we change our ISP modem/router with manually,like we change our IP address?
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