For a breakout board see [https://github.com/SMR404/PinephonePogoBreakout here]. For an example project see Martijn's blog post [https://blog.brixit.nl/making-a-backcover-extension-for-the-pinephone/ <i>"Making a backcover extension for the PinePhone"</i>].
Pine64 store currently sells the PinePhone Flex Breakout Board see [https://pine64.com/product/pinephone-flex-break-out-board/?v=0446c16e2e66]. With the pitch being 2.54 mm this Flex Breakout Board may have leads soldered directly to the contacts for use in a solderless board. A non-soldered solution would be to use a connector that will accept a Flat Flexible Cable 2.54 mm pitch
, for Example, see [https://www.digikey.com/en/products/detail/te-connectivity-amp-connectors/5-520315-6/2258879].
=== Back cover ===