Uniden XC3510 User Manual page 19

Setting the Handset Retainer
The handset retainer holds the Handset in place if your
phone is mounted on a wall. The steps below describe how to remove and
replace the retainer so that the tab faces up.
1. Push up on the Handset
retainer on the Base Unit,
and slide the tab out.
2. Flip the retainer over so the
tab faces up.
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