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。