check at msge setting or option at msge
or try this
Few days back we reviewed Advanced Device Locks
that can be used to lock SMS
and other applications
in a Symbian mobile phone . But ADL was a shareware mobile software and you need to pay after few days of use .Here is another application called Active SMS Lock that can lock SMS messages
in Nokia and other Symbian
devices . Download Active SMS Lock .
Active SMS Lock free SMS lock for Nokia
As you can see in the screenshot , Active SMS lock can lock SMS in inbox , Drafts ,Outbox and other SMS folders .
Open Inbox /required SMS folder > Select SMS
and then lock as shown in screenshot ( Default PIN code is 12345) .Active SMS lock
is completely free and can be installed in following Symbian devices .
Nokia 3250, 5500 Sport, 6290, 6650 T-Mobile, N71, N73, N75, N80, N91, N92, N93, N93i, E50, E51, E60, E61, E61i, E62, E65, E70.
SMS message lock .
Nokia 5700, 6110 Navigator, 6120 Classic, 6121 Classic, 6124 Classic, N77, N78, N81, N82, N92, N95, E90
SMS lock .
Nokia 6210 Navigator, 6220 Classic, N78, N79, N85, N96
SMS lock .
http://www.mobiclue.com/free-sms-lock.html Free SMS lock