How can I get a Spanish SIM (Spanish phone number) for my Camino de Santiago?

SIM card for your Camino de Santiago
SIM card for your Camino de Santiago

The question was:

Can someone walk me through where I need to go, what I need to ask for, to get a telephone in Pamplona that will give me service for about 3 months?

Read the good advice on getting a Spanish phone number (SIM card) for your Camino de Santiago.