I plan to be in Europe for three months visiting relatives. My first destination is Spain and I plan to purchase a phone there. Will I be able to use it all over Europe if I purchase it in Spain?
Welcome to Android Central! That may depend on where you purchase from. If it's specified as unlocked, then you should be able to use it all over Europe (assuming the phone is compatible with the network bands in the other countries you visit). If you buy it directly from a carrier, check with the carrier's device unlock policy.