You might think, not again such a question where are already thousands of topics about..
However, I've not been capable of finding the answer I needed to fix this problem.
None of these topics go as deep as the Keychain.
When I'm trying to deploy my app to an iPhone, Ii'm recieving the following message:
Code Sign error: The identity 'iPhone Developer: [Name] ([ID])' doesn't match any valid, non-expired certificate/private key pair in your keychains.
Provisioning profiles installed on the devices or signed with for the target might not be valid, try to go to
Organizer->Provisioning profile and see if the profiles have the valid status? if not try to delete & refresh them, if they appear valid after refreshing then it might solve your problem if not then you should remove all the entries from
keychain and delete profiles on your provisioning portal and try to create from scratch, if you still face the problem then take help from step by step guide tutorial