How can I go back to old firmware on a tenda 311r+

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DO NOT MAKE THIS SITE WITH YOUR GARBAGE
Take your GARBAGE to another Side

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Go to Maintenance and change the language else you need to change firmware

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You will need an lan or wlan connection to your router, the service/ip address, 1st, open to your web browser, 2nd, type in your service/ ip address into the link, 3rd, login to your router's settings, and find the wireless setting. if you do not understand these steps, please consult you manual for "login to router" settings, or find the web site, and find user assistance.

connect it with lan cable to your laptop or desktop

Push and hold th reset button for 30 seconds or so, the will reset to factory settings. This may help: http://www.tomshardware.com/forum/32272-43-tenda-w311r-installation

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https://servicenumber.org/tenda-customer-service.html

Should be a reset button ..prolly on the back. May need a paperclip to press and hold it in