WVDIAL And Sony Ericsson P1i

I am using Sony Ericson P1i and use indosatm2 as 3G/GPRS packet data. I have already use Gnome PPP but it always reconnect. I try use wvdial and it works.

Its my howto:
1. Attach SE P1i using its cable data to usb port
2. Type dmesg in terminal to know which port used by P1i
The result:
[ 5598.940150] usb 1-1: new full speed USB device using uhci_hcd and address 7
[ 5599.170165] usb 1-1: configuration #1 chosen from 1 choice
[ 5599.177985] cdc_acm 1-1:1.1: ttyACM0: USB ACM device
[ 5599.193591] cdc_acm 1-1:1.3: ttyACM1: USB ACM device
[ 5599.199424] cdc_acm 1-1:1.5: ttyACM2: USB ACM device

Its mean that P1i is use /dev/ttyACM1 port
3. Edit /etc/wvdial.conf
4. Add configuration
[Dialer Defaults]
Modem = /dev/ttyACM1
Baud = 460800
Init = ATZ
Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
Init3 = AT+CGDCONT=1,"IP","indosatm2"
Phone = *99#
Username = "provider username"
Password = "provider password"
New PPPD = yes
5. Open terminal and type wvdial