If i was to purchase a phone on a open term plan is it possibly to pay a bigger deposit at the start and have reduced repayment fees over the 24 month period?
Good question. Not really with how it's built in our system at the moment. It's essentially done like an add-on (like bestmate, Vodafone family, data add-on etc) that's added for 24 months, and these monthly device payment add-ons have different values depending on how much needs to be paid off. So if you're buying in store they might be able to help by taking a higher amount up front and giving you a lower monthly add-on cost, but I don't personally know if that's entirely possible.
@JoelA knows much more about this than I do and can probably confirm.
I've been holding off using this service until it's built better. I suppose that's why the payments can't be applied to a grandfathered plan (even one that was once eligible) because once a plan has been retired nobody can do anything with it in the system.
The $99 deposit is the only option across almost all of our devices sorry (it's a set price, i.e it cannot be increased/decreased etc), excluding a couple of iPhones (iPhone 6 128gb off the top of my head) which has a deposit of $129.