PhoneBOX 4 Client 4.9.0.81 (BETA)

Changes since: PhoneBOX 4 Client 4.9.0.75

FIX - Rebuild to for opus constant bitrate fix in SDP library
FIX - Tabbing into a checkbox and pressing space causes UI lockup
FIX - Prevent transfer of call to difference device when in ringing/dialling state
FIX - Fatal when clicking Live Stream