1. You need the official ROM update from T-Mobile: http://www.tm-phonedownloads.com/fil...K_WWE_Ship.exe
2. Charmer NOID utility: http://data.hu/get/357429/htc_charme..._noid.zip.html
Unzip htc_charmer_upgradeut_noid.zip, then extract nk.nbf from RUU_Charmer_38221_382116_026921_TMO_UK_WWE_Ship.ex e (Simply rename it to rar and open with WinRAR. Inside it you can find the nk.nbf file) and put them together. Now you can flash your charmer just as you can do it officially
Hope this helps!