The SIM card can only be topped up with the original plan type. So the Global plans will only accept a top up of another Global Plan, and vice versa with the Northern Lights Plans.
It is possible to switch though. You will need to notify us to delete any minutes remaining if you wish to cross platforms.
Please give us 72 Hours to complete this task, the clock does not tick on the weekends. Our best advices is to submit your request well in advance.