This is my personal view. And its completely based on my experience with these brands.
All these brands have been huge disappointments and I have vowed not to use them again in my life. These are not rankings as all have been equally disappointing
1.Nokia-Anyone who has been to a Nokia Service Centre will vouch for the pathetic service meted out. Now, I had a problem with my keypad. Even though the product was under warranty, they charged me INR 600 for the change of keypad invoking the "conditions apply" clause. I was fine with it. However, I realised something was amiss when I was not given the part which was replaced. Many emails to Nokia and many visits to the service centre didnt help.A year after this incident, I planned to buy a mobile.This was in April 2010.Around the same time, Nokia unveiled its smartphone E5.The launch date was May 2010.But delays at Nokia, which led to the ouster of many senior managers at the firm led to the E5 hitting the market in September. By then I had shelled out an extra 3k more than what I would have had for a E5 and bought a BB. And I am a BB convert. So no more Nokias for me!
2.Acer-My brother recommended and bought a Acer laptop for me. Two weeks later I had a white screem problem which persisted even after it had been to the service centre twice in one year. It still persists. But now, I dont trust the service nor the product. Most of acer products on my campus have problems related to battery charge or DVD drives.So Its goodbye to Acer!