I'm using a locked Koodo phone (Samsung Galaxy S4) with a monthly plan in the Netherlands while on vacation. I can't seem to get it to register on the network. I'd like to be able to make send text messages to activate an international add-on but I can't even send the text message to do that! I've tried: - restarting my phone - enabling and disabling flight mode - taking the battery out - taking my Sim out - manually selecting a carrier (Vodafone NL, KPN NL and T-Mobile NL: All tell me that my Sim card does not allow me to register on this network) - automatically selecting a carrier (fails) I have about 2 weeks left on vacation and would like to use it before the end. I'm kicking myself for not having unlocked my phone before flying out. Any ideas?