Often users find nokia c6 rom patcher to be an issue in terms of removing it, once it is uploaded into your phone as a part of CFW update.
The file .app sometimes cannot be removed due to certain issues, even If you try deleting it. This can be deleted only if the custom firmware is removed completely.
We need new patches that are compatible with c6 port. Rom patcher that is built-in in the firmware works great, maybe this could be extracted and added to PNHT base firmware for it to work.
Changing the font is the first thing that requires to be done, after which the language and the option to update the patch need to be selected. The auto installer, patch and then nokia c6 rom patcher are added.
It always better to have your phone configured at the nearest nokia care, provided you understand the risk of modding your device using nokia c6 rom patcher.