Now a days one of the most common problems of iphones is “SIM NOT SUPPORTED” ,basically this kind of problems occurs due to some different  reason its depend on that phone.

 
 
If your iPhone is locked with a particular carrier. Some iPhones will only work with thw SIM card which is  provided by the carrier suvh as At&t, Verizon or Vodafone, for example.If your phone is first handed used by you then you can contact your carrier service provider.But if you bought this phpone second hand then there are other ways to unlock your iPhone so that you can use any SIM card. Here, we show you how.Some iPhones are easier to unlock than others, depending on the carrier and the phone’s circumstances.You’ll discover that your iPhone has been locked to a particular network if you insert a SIM card from another network into the iPhone and attempt to make a call. If it doesn’t work, it’s likely that your iPhone is locked to your network. You might see an error messages such as “Invalid SIM,” “PAYT Lock,” “SIM Card Not Accepted,” “Enter SP Code,” or “Insert Correct SIM Card”,” SIM Not Support”.

Unlocking your iPhone is completely legal if you purchased the device unsubsidised or have finished paying for your contract. However, if you’re still paying for your contract, you technically don’t own the iPhone yet, so you really should check with your carrier before unlocking it.

Your can unlock it by using R-sim, but selecting a correct R-sim for your phone is nessary  to get the sollution for your phone, and R-sim works with the compatiblity of IOS ond model of the Iphone. The supported R-sim for iphones are below:-

  • For iphone 4
  • For iphone 4s
  • For iphone 5
  • For iphone 5c
  • For iphone 5s
  • For iphone 6
  • For iphone 6 plus
  • For iphone 6s
  • For iphone 6s plus

Currenty R-sim is supported in iphone 7 and 7plus.