I understand what you mean, but an attacker wouldn't be able to decrypt during a MiTM attack since SSL is being used -- regardless of cert pinning. An effect of

I understand what you mean, but an attacker wouldn't be able to decrypt during a MiTM attack since SSL is being used -- regardless of cert pinning. An effect of pinning is losing the ability to perform a self MiTM to decrypt traffic; this post simply demonstrates bypassing that.