Authorities, tend to be more concerned with more widespread cases.  If this is part of a ring, they will approach it quite slowly and cautiously.  If, it's an isolated case, they really don't have a ton of motivation, based on a missing phone.  There are bigger fish to fry; I would hope.  Yes, it should be handled accordingly, but if they take their time, I would understand.  I know it's harder to see it this way when you are the victim.  There is nothing worse than rushing a case, only to miss a detail and go down in flames, at your own cost.  My brother is "in the business".Â