Brazil

Claro
APN settings
 * username: claro
 * password: claro
 * APN name: claro.com.br

Oi
APN settings
 * username: oi
 * password: oi
 * APN name: gprs.oi.com.br

Telecom
APN settings
 * username: brt
 * password: brt
 * APN name: wap.brt.br

TIM
APN settings
 * username: tim
 * password: tim
 * APN name: timbrasil.br

VIVO
APN settings
 * username: vivo
 * password: vivo
 * APN name: zap.vivo.com.br