是一个personal号码过来的，今天上午收到的。
From Singtel: Dear customer, please note that we will be performing a system upgrade on 24-05-2016 (01:00am to 04:00am SG time) to serve you better. During this time, local and roaming data services will be unavailable. We would like to apologise for any inconvenience caused and will strive to keep the downtime to a minimum.
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