Hello, i upgraded my asus wl-500gp to kamikaze and again configure my E220 usb hsdpa modem, connection working great but dhcp cant get DNS address sad

Modem have ppp0 interface , my /etc/config/network

#### VLAN configuration
config switch eth0
        option vlan0    "1 2 3 4 5*"
        option vlan1    "0 5"


#### Loopback configuration
config interface loopback
        option ifname   "lo"
        option proto    static
        option ipaddr   127.0.0.1
        option netmask  255.0.0.0


#### LAN configuration
config interface lan
        option type     bridge
        option ifname   "eth0.0"
        option proto    static
        option ipaddr   192.168.1.1
        option netmask  255.255.255.0


#### WAN configuration
config interface        wan
        option ifname   ppp0
        option proto    dhcp
#       option hostname PC

To connect i using pppd