My mobile phone card can't roam! But why can I receive the short message from the other party outside the city, and the short message I sent can also be received by the other party!

Dude ~ roaming means calling ~ texting, of course, no problem, and it's the same price all over the country Without roaming, you can still make calls in surrounding counties and cities, but you can't make calls outside the local area. Playing from the local area is not roaming, but playing from other places is roaming.