Chinese phrase
改用〜联系可以吗？ gǎi yòng 〜 lián xì ké yǐ ma
Meaning
Would it be okay to contact someone by ___ instead?
When to use it
It politely asks to contact someone in another way. It is used when the current method is inconvenient; the missing part names the new method. The wording is polite and leaves the choice open.
Example dialogue
如果不方便打字，我们 改用 电话 联系可以吗？ rú guǒ bù fāng biàn dǎ zì wǒ men gǎi yòng diàn huà lián xì ké yǐ ma
If typing is inconvenient, would it be okay if we contacted you by phone instead?
可以，你把号码发给我吧。 ké yǐ nǐ bǎ hào mǎ fā gěi wǒ ba
Okay, send me your number.