Default WiFi tethering on nexus 7 3g kot49h KitKat 4.4.2

Dear all,
I followed most instructions from XDA developers and succeeded in rooting and also installed twrp and super su. But unfortunately none of posts worked for me in re enabling tethering. In my windows phone it is a very basic feature they offer. Some apps like foxfi, tetherfix, etc.. Claim to solve the problem but not working. Foxfi is working OK in USB tethering. Any help is greatly appreciated. Please note I'm using airtel connection.