Nope, But you can get that plan by opening a thread in Mobile Garage Sale stating you want Plan only no need phone and see your inbox getting full in a day 

u mean u want to use the plan but dont want to use the phone??could be around rm2k(16gb) and rm2.4k(32gb)..with that price u still get some profit from it. 

- Savings* = RM200 savings will be deducted upfront from the RRP amount and the balance savings will be credited equally over 24 months in your monthly DiGi bill.
- Savings based on total rebates given every month in your DiGi Postpaid bill + discount on device RRP amount (RM200).
All cash payments must be made in Ringgit Malaysia (RM).

if I am not mistaken, u shd be paying RM1990 for your iPhone 4 16GB, the RM200 rebate is actually refer to deduction from the RRP pricing which is RM2190, hence u are paying RM1990.

Total saving for iDigi 88 is RM920 which is (RM30 x 24) + RM200.  Where RM30 will be equally deducted from your bill over 24 months, which is your first 24 months fix charges at RM58 = RM88 - RM30, and RM200 deduction directly from the RRP price for iPhone 4 which is RM2190 - RM200 = RM1990 (u are paying either with cash/credit card)