请教: "我想给手机冲值"英文怎么翻?

I would like to top up my mobile phone account.

我想给手机冲值
冲 = reload 或 top up, 值 = airtime credits

简明：
I would like to reload my mobile phone.
I would like to top up my mobile phone.

详细：
I would like to reload airtime credits of my mobile phone.
I would like to top up airtime credits of my mobile phone.

"I would like to phone Chongzhi"

I think of for the washing value of mobile phone

I want a recharge card for my cel phone.

recharge可以是充电的意思。
你可以在没钱的时候打打电话，里边的声音会提醒您PLS RECHARGE INTIME.

I would like to top up my mobile phone account.