From my personal experience, I would say DTDC's employees are more likely to be the culprit over here. Their employees have a notorious reputation of stealing things especially when you provide a declaration or invoice mentioning the contents and value of the product inside the parcel.
I used to ship imported chocolates through DTDC until last year. During that time, I had encountered at least 6-7 cases where their delivery guys opened up parcels and stole the chocolates. At first, I presumed the buyer was the culprit and he was simply trying to cheat me. Later on, when other buyers who had bought from me earlier also started complaining about stolen chocolates, I realized that something was amiss. I told them to send me photos of the parcels they received and to my shock I found out that these DTDC guys had tampered with the parcels. The address labels I stuck on the parcels were computer printouts whereas the ones in the images I received from buyers, the address labels were hand written. Clearly, someone from DTDC were opening these parcels since the labels were stuck on the packaging tapes and there was no way to remove them except by tearing off the packaging. Also the boxes were different than ones I used. Unfortunately, the buyers have no way to know this and they end up accepting the parcels. Once the buyer accepts, the liability of DTDC is over...they simply claim they delivered the parcel intact and they will reject all your complaints.
All this started happening after I entered into a contract with them directly. Because of this I had to provide them declarations and invoices for the parcels which mentioned the contents. Before that, I dealt with one of their franchise outlets who would simply forward the shipments by writing gift on the dispatch receipts. I never faced any issues during that time. I guess some of the DTDC delivery guys become greedy and can't control themselves once they come to know what's inside the parcel. Try searching for similar complaints against them on the internet, I'm pretty sure you'll find many of them. Google "DTDC stole mobile phone"
I'm not saying that the buyer is innocent, but there is a good chance that some guy from DTDC stole the phone.
