T'as les infos là http://android.modaco.com/content/dell-streak-streak-modaco-com/325889/streakdroid-1-5-1-release-post/
Donc, si tu es avec la 1.4.6, tu as le bon baseband. Mais tu peux toujours flasher l'amss avant toute chose.THEIR ARE NOW 2 BUILDS BEING RELEASED FOR EACH UPDATE, ONE IS A NEWBASEBAND VERSION WHICH WILL WORK WITH ANY BASEBAND AFTER 1.2 OR ANY OFFICIAL DELL FROYO BASEBAND...