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The cheapest way to get the latest iPhone — including the iPhone 18 Pro or iPhone 18 Pro Max — isn't always the offer with the lowest handset price.

For the best overall value, compare the cost of the iPhone and any mobile service you need, subtract eligible promotions, then factor in the trade-in value of your old device to reduce your effective upgrade cost.

If you already need a mobile plan and have an old phone you no longer use, a phone-plan deal combined with trade-in could reduce your effective upgrade cost further.

There are three main places to look for savings: the phone offer, your mobile plan and the old devices you already own.

Start by comparing promotions for the same iPhone model and storage. Only count savings you’re eligible for, as launch offers may have different requirements.

If you need mobile service too, compare relevant phone-plan offers rather than treating the handset and connectivity as separate decisions. Then check the value of your old devices. If you no longer need them, selling or trading them in could offset part of your upgrade cost.

Looking at all three together gives you a much clearer picture of what you’ll actually pay.

Two deals for the same iPhone can have very different costs once you look beyond the handset price.

One might offer a lower device price but require you to arrange mobile service separately. Another might pair the iPhone with a phone plan and offer eligible device or sign-up savings. If you have a phone to trade in, its remaining value could reduce your upgrade cost further.

This is why it helps to compare the total cost of ownership (TCO) — what you’ll pay for your phone and mobile service over the same period after eligible savings.

A simple comparison is:

iPhone + mobile service − eligible promotions = total cost of ownership

Then factor in the phone you’re replacing:

Total cost of ownership – trade-in value from your old phone = effective upgrade cost

The option with the lowest effective upgrade cost may give you better overall value than the one advertising the cheapest iPhone.

If you already need mobile service, compare the two options over the same period. A lower monthly plan fee doesn’t automatically mean a lower overall cost, just as a cheaper handset price doesn’t automatically mean a better deal.

The better-value option is the one that gives you the phone, data and benefits you need at the better overall cost.

Buying outright or with a phone plan? See how total cost of ownership compares.

See the calculations here >

Yes. Trading in an eligible phone you no longer need can reduce the effective cost of upgrading by putting its assessed value towards your new device.  

An old phone sitting unused at home may still be worth something. Selling it privately may potentially get you a higher price, but you’ll need to find a buyer and manage the sale yourself. Trade-in can be a simpler option if you’d rather turn the phone’s remaining value into savings towards your upgrade.

When comparing trade-in offers, don’t focus on the highest advertised trade-in value alone. Check how each establishment assesses the trade-in value and whether cosmetic wear, missing accessories or original packaging could significantly reduce the final amount. A reputable provider with clear assessment criteria may give you a better idea of what you'll actually receive.

It can also be worth checking the value sooner rather than leaving an unwanted device unused indefinitely. Phone values can change over time as devices age, new models launch and market demand changes.

Want to understand what your old phone could be worth? Read our Complete Guide to Phone Trade-In in Singapore.

Check your device’s trade-in value here >

Compare the final upgrade cost, not one discount

Found a deal on the iPhone 18 Pro or Pro Max? Before buying, compare four things: the price of the exact iPhone you want, the cost of any mobile service you need, the promotions you’re eligible for and what your current phone could be worth.

Looking at those numbers together makes it easier to compare deals that package their savings differently — and helps you avoid choosing an offer simply because one number looks particularly attractive.

If you're buying an iPhone 18 Pro or iPhone 18 Pro Max and also need mobile service, a Singtel phone plan combined with eligible device promotions and Trade-In is worth your consideration.

Choose a plan based on the data and benefits you need, then factor in any eligible savings available for your new iPhone. 

If you have old devices you no longer use, Singtel Trade-In lets you check your its indicative value online, and you don’t need the original box or accessories such as cables to trade in your device. Your confirmed value is provided after assessment. During selected promotions, eligible customers may receive an additional trade-in bonus on top of the assessed value. 

Your total cost as compared to a SIM only plan would then look something like this:

Total savings with phone plan: $168

Savings calculations for the iPhone 18 Pro Max phone are accurate as of 10 September 2026. Terms and conditions apply.

For someone who already needs mobile service and has an unused eligible phone, bringing these together could reduce the effective cost of getting the latest iPhone.

What’s the cheapest way to get the iPhone 18 Pro or iPhone 18 Pro Max in Singapore?

Compare the same iPhone model and storage across offers, then factor in the cost of any mobile service you need, eligible promotions and the value of your current phone. The offer with the lowest advertised handset price isn’t necessarily the one with the lowest effective upgrade cost.

What’s the best-value way to buy the latest iPhone in Singapore?

The best-value option depends on what you need. If you also need mobile service, compare buying the iPhone and plan separately with relevant phone-plan deals, then factor in eligible promotions and any value you can recover from your old phone.

Is it cheaper to buy an iPhone 18 Pro or iPhone 18 Pro Max outright or with a phone plan?

Either can be cheaper depending on the offers available. If you need mobile service anyway, compare the cost of the iPhone and service over the same period rather than comparing only the handset price or monthly plan fee.

Can a phone plan help me get the latest iPhone for less?

It can. Some phone-plan offers may come with different device pricing or eligible promotions, so customers who need both an iPhone and mobile service should compare the overall package with buying each separately.

Can I trade in my old phone to get the iPhone 18 Pro or iPhone 18 Pro Max cheaper?

Yes. If your old phone is eligible and you no longer need it, its assessed trade-in value can offset part of the cost of your new iPhone.

Can I combine an iPhone promotion with trade-in?

It depends on the applicable promotion terms. Where offers can be combined, include both eligible device or plan savings and your total trade-in benefit when comparing your effective upgrade cost.

The bottom line

The cheapest way to get the iPhone 18 Pro or iPhone 18 Pro Max in Singapore isn’t necessarily to choose the lowest advertised handset price. Compare what the iPhone and mobile service you need will cost together, subtract eligible promotions and then factor in the value of your current phone.

If you already need a mobile plan and have an eligible phone you no longer use, a Singtel phone plan combined with eligible iPhone promotions and Trade-In could be a compelling way to lower your effective upgrade cost.

The key number to compare is what you’ll actually pay after the savings available to you — not the biggest discount on the page.

Ready for the iPhone 18 Pro and iPhone 18 Pro Max? Compare Singtel phone plans here.