問英文唔該, 勁急

Smartone website 有句都幾近似, 可以改成:
Special offers for mobile phone are applicable to port-in customers only.

如果你意思係買手機優惠的話就是:
Sperial offers of purchasing handset are only applicable to port-in customers


希望幫到你la

The mobile phone special offer is subject to customers with existing mobile number transfer.

Phone Off With portability customers Turntable

The handset preferential benefit is suitable to takes along customer of the number turnplate