iPhone 4S battery replacement: parts list (and links) and how-to. About $35 for parts and tools. | Cell phone repair, Iphone battery, Iphone battery replacement
How to Take Apart an iPhone 4 or iPhone 4S - Replace Battery or Glass Back - Disassemble Your iPhone - YouTube
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10 Apps That Show Off the iPhone 4S's New Features | PCMag
Reader's take: iPhone 4S is a Siri story - Rediff Getahead
Amazon.com: JETech Funda para iPhone 4 y iPhone 4s, no amarillea, a prueba de golpes, parte trasera transparente antiarañazos (transparente) : Celulares y Accesorios