under the sun
When we were halfway eating Wei Chuan arrived, claiming that he didn't receive my SMSes and we didn't reply his, which of course both Hong Jun and I didn't receive. Hong Jun didn't fail to receive my SMS, and both of us failed to receive Wei Chuan's, then it must be Wei Chuan's service provider's problem. (simple logical induction)
1 hour of lunch and 2 hours of lecture, I was on the way home when I finally received Wei Chuan's SMS. "Lunch?" bleh... 3 hours lag!
Everything under the sun means it won't work under roof.
(it is wise to use SingTel if you are in NUS, since the SingTel tower overlooks NUS across the road...)