An android app which lets you copy contacts to your SIM card

Sometimes due to an emergency or simply because you are tired of the constant
pressure of a smartphone permanently connected to the internet, you need to use
an old phone. It is likely that the only way to move the contacts to it is the
SIM card storage. But built-in android contact manager lacks the ability to
write contacts to the SIM card. Thats when the Dumbphone Assistant comes in.

Dumbphone Assistant lets you copy contacts from