USB OTG Query...Pls reply

Symbian O.S v9.3 provides support for USB-OTG feature which is new inclusion in this version?
v9.2 supports usb 2.0. version,What level of support does Symbian OS v9.2 provide for OTG?
can a device having v9.2 be capable to support applications which use OTG feature. I mean, can a phone with v9.2 symbian o.s support applications which use otg features?
OTG is supplement to 2.0 version of USB.
How can it be known what inclusions in v9.3 of symbian is done to support otg feature, Can additions by OEM side alone sufficient to ensure OTG applications to be compatible for v9.2 phones?
Is 9.3 SDK available for download?
Looking forward to your reply..