I bought my X01HT on September 2006 so I do not have any problem with ROM and radio version. I will describe below how I made my Japanese Softbank X01HT to an English Unlocked Smartphone with Japanese input and proprietary MMS capability (MMS not fully worked, I will update again if I already solve the problem).

1. Unlock the operator restriction so it can use all GSM SIM all over the world using Hermes unlocker by POF. Follow this link to find downloadable zip file, download, extract and follow the instructions found in the text file
2. Flash WM6 mobile ROM cooked wonderfully by Schaps to have an English OS in your smartphone. Download the executable file and run it with active sync active. If you can not download from the link, try this page. Congratulations! Now you already have an unlocked english version windows mobile smartphone. Let’s continue.
3. Time to make your phone displays Japanese, download this Zip file, extract and copy the cab file to your device and run inside it.
4. Download this MMS Lite, extract and run the CAB file in your device and enjoy Softbank’s proprietary MMS.
5. For the input, eventhough it is said that you can have other type of input, I prefer IME input which it had before. You can download from here, copy the cab to the phone and run it.

The phone is ready to go! You now have an English, Unlocked, Japanese capable Smartphone, with Softbank’s proprietary MMS enabled. Congratulations!

Make sure you follow the instructions for each step in each manual found carefully. But, if not you can always start again from the beginning. Don’t worry about breaking your phone since step 1 and 2 which is the most dangerous are already equipped with Hard-SPL/SSPL flashing which is said can protect from bricking the phone. That is my opinion, but for more cautious guy, you may want to check the XDA forum first. Furthermore, my X01HT is before Dec 2006 version, so I do not have too much obstacle.

Next step is installing softwares for my phone so I can be more productive and have fun with it. My choice of free powerful softwares to be first installed are :

1. Mobipocket to read e-books – you can also easily make/convert ebooks from other formats using Mobipocket Creator as simple as drag and drop and synchronize with your device seamlessly.
2. MS Reader – for ebook with lit format
3. Pocket Islam – complete package so I can hear Quran while reading the meaning. The sound is linked with the text, it will highlight the ayat that is being played in reciter sound. Cool!
4. TCPMP with divx, flv codecs - complete multimedia solution. You can play many format of videos and music

Credits:

• XDA Developers WIKI for HTC Hermes Device as main reference
• POF Page for Hermes SIM Unlocker
• First page for step by step setting X01HT to WM6, modified a little bit in this article
• Softbank AP network settings
• Asukal, great work for many PDA things
• Alcibiade X01HT unlock and upgrade for Gaijin.