Alaskan cable operator General Communication Inc., better known as GCI, will offer the Apple iPhone 4S beginning April 20. The 4S will be available starting at $150 for the 16 GB model, $250 for the 32 GB model and $350 for the 64 GB model with a new two-year contract and data plan. In addition, GCI will offer the iPhone 4 for $50 and iPhone 3GS for free with a new two-year contract and data plan.