[mothered]

I think DNA is not great because in my country, the carrier that delivers stuff from Amazon always ask for a signature

A signature cannot confirm the delivery was personally received by yourself.

Anyone could've signed for It- even the driver himself, which I experience on a daily basis.

The phone is around 220g, maybe I could add a bunch of accessories or other small but heavier items and a partial empty box would be the best option?

Whether you add 10 Items or 100 Items, It won't make any difference.

If they Investigate, they'll simply take the weight of the phone and cross-check the carrier's records. If the consignment Is not 220 grams lighter, then the phone was enclosed.

Even if Amazon blocks the phone in the country of the store (like Germany for Amazon.de) it would probably still work on my country

If the IMEI Is placed In a pool of blacklisted numbers, upon attempting to activate It with a given phone carrier, It'll be Identified and the connection will be declined.