Just got a message from Vodafone:
"Hello! As a special Vodafone customer, we have extended your validity to lifelong. You can now enjoy incoming calls free for life! Keep talking!"
Wow! This is the first time that something like this that I've got. Yay! :)
Perhaps this is the result of being their loyal customer since 2005. Whatever the reason, I'm not complaining.
Of course, lifetime means till their license expires, which is 25-09-2021.