According to The Next Web, hundreds of thousands of twitter users used both the iPhone 5 and FML hashtags last month.
The posts appeared most notably in the periods when the device was unveiled and then launched.
The site writes that most of the posts contain disappointment with the new handset.
“#Iphone5 launches just 6 weeks after I get my 4s. #FML”
“I’ve been waiting 6 months to upgrade to the #iPhone5! No cool new features, #FML”
Some users expressed complaints about the new Lightning connector and the Maps app.