1）你必须预存120元的话费才能买这个手机.
-- We regret to inform our customers that 120 yuan previous bill deposit is nonnegotiable before purchasing this mobile phone.
2）如果不预存120元话费的话,就不能买这个手机.
-- Customers' who fail to make the promissory deposit are not entitled to buy this product from our company.
3）这120元话费是你的,你打电话需要电话费是吧?这个预存120元话费买手机是我们移动公司搞的活动.
-- ChinaMobile does not provide free calls.Customers' 120 yuan deposit is to be used to pay their own phone bills.
4) 这个预存120元话费买手机是我们移动公司搞的活动.
-- The current deposit-sale of mobile phones is an activity of ChinaMobie's promotion campaign.