what particular Iphone are you referring? is it the Iphone 5s, 5c, 6 or 6 Plus?
You can refer to this link Mobile Phones, Broadband Products, Prepaid & Postpaid | Online Shop - Globe to know if the phone of your choice is in stock as well as the cashout amount per plan.
Hope this helps.
ay ndi naaus.. i was referring to iphone 6 16gb