[offtopic]
I got the frikkin' phone back
It had no sim in it so i figured it was gone for good.
Also figuring the thief was maybe just broke af for snatching such an obviously old device, i came up with a kind of last resort social hack that worked to my utter astonishment.
I wrote a letter to the thief placing it on the night-drawer were i last remembered to have seen my dear nexus.
Asking him/her to return it as it would be of no real use in resale and explaining the nature of the software it runs and its sentimental value in few sentences. I attached my usual 20€ tip for the cleaning staff upfront.
The letter disappeared without exchange for the phone and i thought i am the greatest idiot of all time the whole Thursday evening, for even throwing money after the thief.
The surprise came when checking out of the hotel yesterday morning. "Someone" had placed the nexus in Lost+Found at the reception and thankfully the staff correctly remembered i reported missing one on tuesday.

Sooo, i still ask myself did i just stupidly loose it myself (somewhee else int the hotel) and not find it (while thoroughly searching the whole wednesday evening) in the hotel room, cleaning staff simply found it and coincidentally put it into L+F the right time?
Yeah, not 100% ruled out that it went down a little different than i "figure" above, but i am quite certain to not have moved the phone from the drawer as i strictly brought it as an alarm clock to wake me up at 5.
Any way OT solved, faith in humanity restored. Sry 4 the length.
[/offtopic]