RadioShack has officially confirmed that through Saturday, August 20, customers visiting their local RadioShacks will receive a $30 instant savings on the iPhone 4. The promotion drops the price of 16GB and 32GB units to $269.99 and $169.99, respectively; customers can also participate in the Trade & Save program which offers up to $150 on the trade in of their current iPhone 3G or iPhone 3GS. New iPhone 3GS units are also part of the promotion,…
