I think Huawei need to avoid doing what HTC did at all costs. My last phone was an HTC Hero, flagship phone when I first got it, they dropped it like a hot potato within months. They were an OEM manufacturer that had ambitions to become a 'brand' like Samsung and Apple, but they flooded the market with an endless array of models without building up a proper back-end and support infrastructure. Look at them now, struggling to compete with Samsung and Apple and a share price at a 12 month low.
I can see Huawei doing the exact same thing if they aren't careful.