The amazon.com/BB app works perfect on BB6 for 9700. The Mobipocket Reader Beta for Touch also works perfect for the 9700 (even though its not touch)
So, perhaps you can try them on the 9300
Also, it depends on which providers 448 you are using. The first 448 version I tried was garbage. The current one from Vodafone is much better....
Try this link..
Official OS 6.0.0.448 for the BlackBerry Bold 9700 & Curve 3G 9300 from Vodafone | CrackBerry.com
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