Here is simple instruction how-to downgrade new SL3 phones via Erase method.
Also this will be useful for repair phone - like - full SW rebuild ( Erase )
Platforms :
By ONLY USB cable can be done with :
RAPU11 - 6700, E52,E72, 5630, C5, N8, C7, C6-01, C3-01, X3-02, C5-03, E7...