Do I understand you to mean that the smartphones, etc., do not have WPA2 enterprise support? I think that must be true, as I have not seen that available in smartphones that I allowed. They do support WPA2 (non-enterprise). -- It is easier for a camel to put on a bikini than an old man to thread a needle.
OK, that's what I thought. The router I have dealt with in this situation can support VLAN and also WPA2-Enterprise, but all those smartphones don't understand WPA2-Enterprise.
I wonder whether you can use WPA2-Enterprise mixed and it would work with the smartphones? I have not tested this. After some checking, I think this probably would not work, either. I also found some commentary about WPA2-Enterprise and Apple iOS5 having issues with connecting. -- It is easier for a camel to put on a bikini than an old man to thread a needle.