[SOLVED] The Message Symbol Keeps Flashing In Nokia Phone

there is a constant message flashing symbol just besides the battery bar sometimes
it is due to the full memory..the memory may be phone memory or memory card..
if both the memory have sufficient space then ur SIM card memory is full for that

"Select and delete all the Sim messages that should stop the Sim full error...."

Yeah, I had this problem too! :-) What it usually means is the SIM card`s message memory is full, but if you wipe the SIM card`s messages the envelope goes away. Here`s how to do it:

1. Go to Messaging
2. Select Options
3. Select SIM messages
4. Select and delete all the SIM message

That Should Stop The SIM SMS Full