PSTV & Vita only! There has been some amount of confusion regarding how to do this, as well as what I consider undeserved FUD, so I decided to create a post with detailed instructions. Follow these directions carefully. As with all console hacking endeavours there is a possibility that things can go wrong and there are no guarantees implied or otherwise that you will not get banned or break something. YOU WILL LOSE SAVES & PROFILE DATA IF YOU DO NOT HAVE A BACKUP. So do create backups first. This short guide is adapted from the original Russian tutorial found Here. Also, thanks to u/kiru2488 who seems to be the first person to bring attention to it in the english speaking scene, and who I first heard of it through his post Here. IDU mode WILL begin system updates WITHOUT WARNING or any prompts at all if the PS4 is connected to the internet. Disabling Internet capability is VITAL. Back-Up your user data, if you can isolate figure out what causes data loss in this process, please contact me via DM or @ Reddit in r/PS4homebrew (u/fuctface) PREPERATION You will more than likely lose your Save and Profile Data if you haven't yet made backups! Remove all USB devices from PS4. Make sure you are able to run payloads via cache mode with network disabled (or use offline method). Exit to the main menu and select "Profile" -> "Change User". In the "Name" field, change the name of your user to "User1". ENTERING IDU MODE Power on the PS4. Go to "Settings" -> "Network" and make sure the "Connect to the Internet" is left unchecked. Go to your browser (or user guide if applicable) and launch the "HEN" payload. Go to "Settings" -> "Debug Settings" -> "System" -> "IDU mode", select "On" Click "OK" to reboot. Wait until you see "Provide unit with a valid network connection or insert IDU update disc" in the upper right of the screen Turn controller back on and hold (R1) + (R2) + (L1) + (L2) + (Option) + (UP) until "Staff Mode" is enabled. ENTERING REMOTE PLAY On your PS4, go to "Settings" -> "Remote Play Connection Settings" and check the box that says "Direct Connection to PS Vita / PS TV System". Next while still in "Remote Play Connection Settings" choose "Add Device". On the device you wish to use remote play on (Vita, PSTV, PC) start the Remote Play/PS4 Link application. On your Vita/PSTV, create a new (direct) connection to the PS4 and enter the pairing code on the Vita/PSTV. A new user will be created, "User2". Do not delete this user or you will also disable Remote Play for the other profiles. EXIT IDU MODE Run "HEN" if "Debug Settings" is unavailable under system settings. Go to "Settings" -> "Debug Settings" -> "System" -> "IDU mode" and choose "Off" to disable IDU mode. Click "OK" to reboot. A Note on PC Remote Play: I do believe it is possible to get it to work, but you need have both PC and PS4 connected to an access point without internet. A router with the WAN cable unplugged or a similar setup. I have had some success with connecting both PS4 and PC to an ESP8266 flashed with a localhost exploit server. You may also need an older version of the Remote Play application. I don't have anymore time to work on this today but I hope to get it going and I will detail it in a later post.