Is iOS 4 Still Signed?

iOS 4 signing status for all 4.x releases. See which firmware builds are still signed and which devices are compatible.
4
iOS 4

4.2.1

8C148a
November 21, 2010
1 iPhone, 1 iPod touch
Signed

4.1

8B118
September 21, 2010
2 iPhones, 2 iPod touches
Signed
See all devices with limited version support →