Need to installl Lync 2010 client in windows phone 5.1.2 version

Hi,

Need to install Lync 2010/Lync 2013 client in my old windows phone version (5.1.2) as windows market is not working/not supported by Microsoft.So, i need to install Lync client manually in my windows phone please help me by any Link and procedure to install manually.

Thanks,

NDEVI