Have got a Samsung X450 mobile on PAYG. Have not used it for a while now but as its still got credit, charged it up today. Managed to set the time and date but when it came to the year it would not accept 2015 or beyond. Would not go further than 2014. Have not tried to make a call or send text message as yet. Realise its an old model. Any ideas as to why it wont go beyond 2014.?