To record calls well, all other recorders ask you root your HTC One SV phone, otherwise they can only record your voice, the caller's voice can't be recorded.
Actually, No Root Needed, we have the perfect solution - just install Boldbeast Recorder V7.5 or newer versions, use these settings to record calls:
- Record Mode: 1
- Record Format: 3GP/MP4/AMR, or WAV
- Tune Audio Route: Group3
It works great, recorded sound are loud and clear in two sides. Bluetooth recording also works.
Thanks to Zachary Somerset, he tested with his HTC One SV C525c (Boost) Android 4.2.2, works like a charm.