How to open this phone up? And replace charging port/board?

@radley76670 since iFixit does not yet have any specific guides for this phone, use something like this video for the repair. the charging board is available at many places including this one. Example only, not an endorsement

While you work on your phone, take lots of pictures. Once you are done with it, take those pictures and create a guide for iFixit. That will help the next person that has a device with the same issues as you do. It's easy and fun to create these guides. https://ifixit.com/Guide/new The iFixit community will appreciate this.

Repair is War on Entropy!