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Brian had experienced the first iPhone, and was attracted by Apple's decision to open up the device to third-party applications.
He was also keen on the new version's 3G capabilities. "The original one just wasn't fast enough," he said.
"I like the Exchange compatibility too," he added. "I'm an IT consultant and need to have that technology behind me. The style of the phone also looks good for clients."
"The main reason I didn't buy the old iPhone was I couldn't put [third-party] software on there," said Steve. "Now that I can buy the programs I want, it opens it up as a useful tool."
Steve, however, works for the government agency Defra, and said he would not be able to use his iPhone as a work device because it does not comply with the strict governmental security protocols. "They're sniffy about the devices they allow on their network," he said.
Zulfiqar, who works in website operations, said he had not been sure about the iPhone the first time round. "I had a Nokia N95, but I played around with my friends' iPhones and decided I wanted to get one," he said.
He added that he had also been put off buying the first iPhone because he knew the second one would have new features like 3G. Asked whether he would use the Exchange compatibility, he said he would, but he would still not use the device as his official work phone. "They won't provision it at work, but I'll do it myself," he said.