如在大城市可考虑t-mobile...
两根线$80,然后每加一根加$10。
Unlimited Voice,
Unlimited Text,
Unlimited Date --- first 1GB is high speed (4G LTE or 3.5G HSPA+) , then drop to 2G speed. This is per line but sometime there's offer to combine 3GB shared high speed data (4G LTE or 3.5G HSPA+). No overrage charge, just drop down to 2G speed if over the limit.
又:任何一根线,加$10就有3GB high speed data.
When going abroad (100+ countries):
Voice: $0.40/min
Unlimited Text
Unlimited Data at 2G speed (not good for audio/video but OK for WeChat text)
当然还要加不少费税
t-mobile出了大城市就不太好,当然AT&T也差不多。