I can't say much because I'm about to be getting my hair cut, but don't ever call and ask. It'll probably result in signs.
Okay, I'm back. Please don't ever call a business to inquire on their firearm policy. Often times, a business will not have a specific policy in place until someone calls and inquires. Many businesses end up putting signs up very shortly after.
It is always better to show up at a business and see for yourself. No sign? Carry on. If they ask you to leave, then you know their policy. If not, no harm done.
Also keep in mine that although the mall may not prohibit firearms, the individual stores within the mall may.
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