Dual sim adapter + black case for iPhone 4 and 4S 2-phones-in-1

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  not happy with this product  

  Dual sim adapter + black case for iPhone 4 and 4S 2-phones-in-1 (Wireless Phone Accessory)

  I thought I could use both chips simultaneously, but this is not the case! more transfer sim is very long! I have an orange chip and chip free and free is not always recognized A INADVISABLE
  Buy at Amazon.com
• 

  Not practical to use  

  Dual sim adapter + black case for iPhone 4 and 4S 2-phones-in-1 (Wireless Phone Accessory)

  I do not like the product, I will look for a dual sim device directly next time. But maybe you like it to you.
  Buy at Amazon.com