Send the following on WhatsApp
Continue to ChatUpdate OnePlus One to Marshmallow with CM 13 ROM [Official] https://www.stechguide.com/update-oneplus-one-to-marshmallow-with-cm-13/
Update OnePlus One to Marshmallow with CM 13 ROM [Official] https://www.stechguide.com/update-oneplus-one-to-marshmallow-with-cm-13/