This statement could easily be construed to mean that when Apple releases the updated firmware that is OS 3.1, AT&T will be ready to turn on MMS functionality.

这个说法很容易就会被解读成当苹果发布OS3.1固件更新时，AT&也将会启用彩信服 功能。

youdao

For at least the third time this month, Apple and AT&T are being sued by a consumer complaining of being duped into believing that multimedia messaging, or MMS, was already available on the iPhone.

苹果与AT&T最近可谓麻烦连连，本月 他们已经是第三次被消费者起诉在宣传iPhone 3GS时有误导消费者的行为，这位用户宣称两家厂商 欺骗消费者称iPhone 3GS能够支持彩信功能，而在目前的实际产品上却无法实现这种功能 。

youdao

What happens when someone sends you an MMS (which the iPhone doesn't support)?

ENGADGET: We've got iPhones, what do you want to know?

"MMS has not been as successful to the extent it was anticipated and there doesn't look like there will be significant changes over the next 12 months, " said Mr Shaikh.

BBC: NEWS | Technology | Mobile users 'want cheaper calls'