Months ago i paid for Home Broadband. In my room i couldn't receive any signal so i connected it to my home telephone. In that case i'd like to surf the internet or playing games in my room so i need an extra Router for building wifi network system. I purchased this one TP-LINK Router. At the very first 2 months it worked really perfectly. But last month the speed is unstable and even dead after hours' using. Being troubled by this kind of stuff, and unfortunately i got the invoice lost. But TP-LINK saler told me that i could change a new one with warranty. Now it's summer, i can't make sure if it's related to high tempreture, either if the data settng was wrong. Any answers and suggestions will be appreciated!