Questione giuridica chiave
Whether the cantonal findings on witness credibility and the defendant's use of the phone were arbitrary and violated the presumption of innocence.
Decisione estratta
The criticism was merely appellatory and did not show manifestly incorrect fact-finding or serious doubt requiring intervention.
Motivazione estratta
The Federal Court is bound by the cantonal findings unless they are arbitrary; the defendant did not substantiate that the witness was generally unreliable.