SIP T-58V phonebook search

Hello I have SIP T-58V with remote addressbook. How to search in non-English book case insensitive?

If Name "Иванка" Begins Big Word and I search "иванка" I find nothing. If name in english - searching is case insensitive. Is it bug?

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(Today 07:51 AM)Aidar Wrote:  Hello I have SIP T-58V with remote addressbook. How to search in non-English book case insensitive?

If Name "Иванка" Begins Big Word and I search "иванка" I find nothing. If name in english - searching is case insensitive. Is it bug?

firmware latest 58.80.0.40