I'm new to the Apple Upgrade Program. Are there any disadvantages or restraints to making any large advance payments toward the balance of my device (is it even possible), or should I stick with the standard monthly payment I'm committed to?
The only time I would make more than the required monthly payment is if I needed to get to the 12 minimum payments required to do an iPhone upgrade. I did this when the XS came out because the X was released a month later and I had only made 11 payments. The other reason would be you want to sell your iPhone instead of trading it in and what you feel you could get makes it a good deal.