之前的一台lg volt已激活在ringplus，我分别用它的meid和imei输入测试了一下：
显示:
Congratulations, it looks like your device is currently in use and may be
eligible to register on RingPlus! You can sign up and port over your
currently active device by registering below.
但输入esn却出现：
Hm... We couldn't locate that MEID / ESN in the database. Please double
check to be sure you entered the MEID / ESN correctly. 为什么会是这样？？？
？？？？？
还有，难道不是比较旧款的cdma机子才用esn吗？ lg volt是14年的，为何还有esn？？
？？？
