The puzzle posed here is what Tiangang is telling everybody?
Tiangang wants to 告诉[gàosù] 大家[dàjiā]：
A. He lost his phone
B. He wants to buy a new phone
C. You can call his old number
D. His number now
In his SMS, Tiangang writes that he lost
his phone, he has bought a new one,
so don’t call his original number.
The only minor difficulty here is
原来的号码， 原来[yuánlái]的 meaning original
another way of saying his 旧[jiù](old) 号码[hàomǎ].
As his old phone is lost and he tells everyone not to call it,
and he’s using his new phone to send the message,
the answer is D. 现在的号码， his number now