Instruction: Given a question and its related document, determine if the question is answerable by analyzing the information in the document. Output yes if the document addresses the question, or no otherwise.

Input:
Question: this unlocked? is gsm?
Document: phone works great! bought as a replacement for a water damages phone. son wanted exact phone he had so this worked out great. does all the things the more expensive phones do without the cost.
it has started to freeze up and wont hild a charge. but.i have to deal with it cause i have no money to buy another one....
i like the phone its better than the other htc phones that i ha i whould tell people to get the phone
The phone began to get hot within the first week of having it. After charging it, it would turn on and stay in upload mode.
The cell phone does no work properly it turns off once it is disconnected from the charger.very disappointed I am stuck with no phone again.
Thank you very much, i like so much my Sprint HTC EVO Design Android 4G Phone I feel happy for this product.Epifania de Paula R
Supper slow phone! The camera sucks . Takes blurry pictures. Too text it's the most annoying thing ever. And the battery life sucks
My new phone is exactly what I expected. It's my first touch screen phone,  I like it. Easy to use and navigate
I love this product. I can now have music and dirty videos on my phone. I uploaded a video of a truck loading dirt onto another truck. It was really messy. I loved it! I felt like Bob the builder after watching this!
Good working condition
Answer: no