@ahmetilhan ,
Apologies for any confusion, but you are comparing two different services, each with their own discount options. For Postpay service, unlimited data plans can receive discounts based on auto pay enrollment, multiple phone lines, and select employee discounts listed earlier. Grandfathered plans, such as what you had said you have currently, would have different discounts that may or may not transfer to newer plans - it really depends on what the discount is and requires, as some may only apply to that specific data plan. The Prepay discount you mention is specific to Prepay services, where you can get a discount based on consecutive months of active service.
