It’s been almost 25 years since the tech giant IBM developed the world’s first smartphone known as “Simon”. The phone went on sale in 1994. Although substantially bulky, the phone outrivaled all its competitors by offering some amazing features at that time which included a touchscreen, email capability and a handful of built-in apps like a calculator and a sketch pad.

It was indeed a futuristic approach by IBM which was adopted by the industry-leading phone makers like Nokia and Sony Ericsson which started to produce their own renditions of what a smartphone should really be aimed at.

These companies continued to enjoy their dominance over the smartphone industry until Apple came along in 2007 introducing its first iPhone which changed everything about the portable access to information via smartphone. After that, HTC commercially introduced the world’s first Android phone and since then these companies have been bridging the communication gaps.

However, some of the smartphones beat other in terms of sales. Here we have compiled a list of the best selling smartphones of time.

5. iPhone 4s (60 Million Units)

best selling iPhone 4s

In terms of design, the iPhone 4s was not a substantial upgrade from its predecessor iPhone 4, however, it packed a better camera and a beefed-up processor.

But one of the main reasons for iPhone 4s to make it to the top 5 best selling smartphones is that it was the first phone from Apple which featured the company’s voice assistant, Siri.

Moreover, iPhone 4s was the first iPhone that was released in October, 16 months after the release of the iPhone 4. All these reasons collectively caused the phone to be the first from Apple to reach such a huge sales number in the global market.

4. iPhone 5 (70 Million Units)

Iphone 5 best selling smartphones

The successor of the iPhone 4s came out to be even more successful in sales. Both the design and the internals of the iPhone 5 were a huge upgrade from its predecessor and resulted in ranking it among the best selling smartphones ever.

The phone’s design had a major overhaul and boasted a bigger screen with better resolution and a wide 16:9 aspect ratio. iPhone 5 packed a dual-core Apple A6 processor along with doubled RAM, which was twice as fast as what its predecessor had.

What makes this phone’s sales more impressive is that it was discontinued only after a year despite which it managed to sell over 70 million units in a short period of 12 months.

3. Samsung Galaxy S4 (80 Million Units)

Galaxy S4

Samsung capitalized on the popularity of Galaxy S3 and used almost the same design language with upgraded internals in Galaxy S4 to rank it among the best selling smartphones of all time.

Although the design language didn’t change much, S4 introduced major changes which were all software based. For the first time, Samsung introduced the ability in the phone to detect a finger hovering over its display. The famous and useful feature “eye tracking” was also introduced for the first time in the Galaxy S4.

Though tech critics were not much excited about the phone because of its monotonous design, it managed to hit 10 million unit sales in just 27 days. It further went on to hit a record of 80 million units and cemented its place among the best selling smartphones of all time.

2. Nokia 5230 (150 Million Units)

Nokia 5230

Although an unusual name to be on the list among giants like Apple and Samsung, Nokia 5230 was the first low-end smartphone from the company to reach such a high mark in sales.

The phone was released in 2009 and was equipped with the Symbian OS. The phone lacked Wi-Fi capabilities and sported a small 3.2-inch touchscreen with a low-resolution camera.

It was the lack of features that allowed the company to price the phone extremely low, which helped it sell a lot of units in emerging markets and led the phone to rank 2nd among the best selling smartphones of all time.

1. Apple iPhone 6 and iPhone 6 Plus (220 Million Units)

Iphone 6 and 6 Plus

The iPhone 6 was a major upgrade from iPhone 5s in terms of design as well as the specs. For the first time, Apple switched to a two phone line up with iPhone 6 and 6 Plus.

It came in two sizes-4.7 and 5.5 inches- which satisfied the pumped up demand for a bigger sized iPhone. It was also the first phone from Apple to host an NFC chip.

iPhone 6 came with Apple A8 chip and increased battery capacity and a massive difference in screen resolution as compared to its. These factors combined to sore the popularity graph of the phone in China which lead to an 84% increase in phone sales in the region.

iPhone 6 duo was equally popular in the rest of the world too which ultimately resulted in the sale of 220 Million units. This is the highest number of sales ever achieved by any smartphone.