If you want to buy a modem to use with Live TIM in Brazil you need to make sure you’re buying a VDSL2 modem.
If you buy an ADSL2 or an ADSL2+ modem, it will not work.
You need the following information to make a connection in your modem
ATM Configuration
VPI(0-255):0
VCI(32-65535):41
PPPoE
PPP Username: guest
PPP Password: guest