Is nich ganz richtig. Im Englischen gibt's irgendwo "It is a must" ... und weil das so schön deutsch-ähnlich ist, haben die FachIdioten der "Handy"-Denglisch-Erfinder das gleich mal toll gefunden.

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Main Entry: 1
must
Function: verb
Inflected Form(s): present & past all persons must
Etymology: Middle English moste, from Old English mOste, past indicative & subjunctive of mOtan to be allowed to, have to; akin to Old High German muozan to be allowed to, have to
verbal auxiliary
1 a : be commanded or requested to b : be urged to : ought by all means to
2 : be compelled by physical necessity to : be required by immediate or future need or purpose to
3 a : be obliged to : be compelled by social considerations to b : be required by law, custom, or moral conscience to c : be determined to d : be unreasonably or perversely compelled to
4 : be logically inferred or supposed to
5 : be compelled by fate or by natural law to
6 : was or were presumably certain to : was or were bound to
7 dialect : MAY, SHALL -- used chiefly in questions
intransitive verb, archaic : to be obliged to go