after some tests I learned that: 1. phone call ring (outgoing) sets range [>=600,>=600] 2. during the phone call [250,>=600] 3. after the phone call [min,>=600] >=600 means smallest available frequency >= 600MHz so only with letho's 250/500/625/720/900 kernel you would see that the max after the phone call is 625MHz. can anybody confirm that?