How to say insure this phone in Mandarin?

♡♡♡Standard Chinese Language Learning♡♡♡ (Mandarin) () 邮局系列(九)保价 A：Xū bù xūyào duì zhè bù shǒujī bǎojià？ A：需不需要对这部手机保价？ A: Do you need to insure this phone? B：Xūyào，bǎo sìqiān rénmínbì。 B：需要，保四千人民币。 B: Yes. I need to insure the phone for RMB 4,000.