Only the court can change the conditions of probation. If those conditions include an ignition interlock, then only the court can delete that condition. Getting a change of probation conditions is typically best done with the assistance of a criminal defense lawyer. There is not guarantee that such efforts will be successful however.
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Your attorney needs to file a motion to remove the Interlock condition from your probation. Judges will often grant it if you are halfway through the probation and haven't had any violations. But it is completely within the discretion of the court.
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You likely cannot get rid of the in-home device because you got the DWI while underage (and you definitely cannot if you are on DIVERT.) If you are on probation and not DIVERT, you can make an appointment with the judge to ask that your fees on reporting be reduced (so you will have more to pay for the device.) And, you can get a job (even if you are in high school - it is not unusual.)
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