New Delhi, Sept. 14 -- If you regularly upgrade to an expensive smartphone every two or three years, it may be worth treating the purchase as a separate financial goal instead of dipping into your regular savings or investments.

A dedicated "phone-upgrade fund" allows you to set aside a fixed amount each month, spread the cost over time, and avoid a sudden financial strain when it is time to buy a new phone.

According to Apple.com, the iPhone Duo starts at Rs.2,99,900 in India for the 256GB model. The 512GB version costs Rs.3,24,900, while the 1TB and 2TB variants are priced at Rs.3,74,900 and Rs.4,49,900, respectively.

If you want to buy the phone after three years and assume that its price remains unchanged, the monthly amount you ne...