Dear Sir / Madam, I am writing to you to express my complaint about the ipad I bought from your online store the other day. At first, I was quite pleased with my new learning device. It worked just fine. Unfortunately, after playing some games on it, the screen freezes every time when I try to get access to the "Dictionary'' section. I reset the device several times but now the problem still exists. Therefore, I suggest a free replacement for my device. Also to avoid similar complaints, your company should run stricter quality tests on products. Your prompt attention would be highly appreciated. I look forward to your satisfactory feedback. Sincerely yours, Li Ming