Lenovo tech support troubleshooted my N 7260 which consisted of making a few settings different on the adapter... such as increasing roaming aggressiveness to "5. Highest" and confirming the deselection of "Allow the computer to turn off this device to save power" settings. We let the laptop sleep and like clockwork, when the laptop woke it did not recognize it had a wifi card.
Lenovo offered to send me a replacement card, but said it would be the same 7260. I asked if there was another card they could send, perhaps the 7265 that appears to have recently been released, since its widely known the 7260 is defective. They said they do not have any info on the 7265. OK then, I said to send the replacement 7260 so at least we could establish beyond a doubt that the 7260s are a defective product (as if there was any doubt). Then Lenovo came back on the line and said they had no 7260s available, and no information on when they might have them to send. In other words, no solution whatsoever.
I then asked what other non-Intel wifi cards would work with the Flex 15. They said none that they are aware of.
So what choice is there but class action and contacting the state attorney general for help? So short sighted. I used to think of Lenovo and Intel as quality companies.