$ grep -i E001E61C `find . -type f | grep -v .git`
./mkspecs/features/symbian/default_post.prf:#       while self-signed version typically has temporary UID3 of 0xE001E61C.
./mkspecs/features/symbian/default_post.prf:contains(CONFIG, qt):!contains(TARGET.UID3, 0x2001E61C):!contains(TARGET.UID3, 0xE001E61C):isEmpty(QT_LIBINFIX) {
./src/qbase.pri:        else: PARTIAL_UPGRADE_UID = 0xE001E61C
./src/s60installs/s60installs.pro:        TARGET.UID3 = 0xE001E61C