System → Handset Settings → Programmable Keys → Line Key Settings → Line Key 3 → Account
User Settings → Progrm'able key → Line key → L3 Account
<hs_settings>
<idx id="x">
<pfk>
<line3>
<account>VALIDVALUE</account>
</line3>
</pfk>
</idx>
</hs_settings>
Programmable feature account on handset (L3 key).
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