All Things D was the first to pick up on the sale.
You can now get the 16 GB iPhone 4S for $150 and the 32 GB and 64 GB for $250 and $350, respectively.
So far AT&T and Verizon are still selling the iPhone 4S starting at the regular $200.
The price drop comes just weeks before Apple is expected to announce its next iPhone. Apple has all but confirmed that announcement is coming September 12.
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