[mothered]

Package weight would be approx 200-250 grams. The phone itself is 188 grams.

Thanks for that.

188 grams now comes to mind for the phone you're planning to SE. I was thinking of the missing Item method, however It's a little too heavy- should an Investigation be opened. See whether the carrier will request a signature and most Importantly, If photos are taken on delivery. I'd say either or both would be required, but If not, It's perfect for the DNA. You can also box them, by adding a weight substitute to match that of the phone.

Alternatively, the "sealed box method" will have a very good chance of success- but the box must not display any Inconsistencies whatsoever.