Android LTE feather script

enable_LTE_n4.sh

#!/system/bin/sh
iptables -A bw_FORWARD -i !lo+
iptables -A natctrl_FORWARD -j RETURN -i rmnet+ -o wlan0 -m state --state RELATED,ESTABLISHED
iptables -A natctrl_FORWARD -j DROP -i wlan0 -o rmnet+ -m state --state INVALID
iptables -A natctrl_FORWARD -j RETURN -i wlan0 -o rmnet+
iptables -A natctrl_FORWARD -j DROP
iptables -A natctrl_nat_POSTROUTING -t nat -o rmnet+ -j MASQUERADE

Using this script to enable LTE Wifi tether on my Nexus 4.