You might need to open the case and search for pins surrounding a chip with a TTL device (search for pinouts of your chip), but I guarantee you that the phone is always recoverable
Working with and building circuit testers, I can say those pins also very likely have test pads routed to them for when the board was originally programmed. Look for un-tinned, smallish solder pads that looks like a needle may have pricked them.
Working with and building circuit testers, I can say those pins also very likely have test pads routed to them for when the board was originally programmed. Look for un-tinned, smallish solder pads that looks like a needle may have pricked them.