I had been using the samsung metro B313 for more than 2 years and it is working upto now.
Look: -
This is very simple phone and it is simply awesome. Very simple design and it is fit to use in hand easily.
Performance: -
The performance is also good. The battery will take 7-8 hrs continuous use to get drained completely and in my opinion with such type of battery backup this phone is awesome.
Easy to use: -
This phone easily get fits to users hand and make it very simple to use.Also the operating system and software is also very easy for any age group users to use it easily and freely.
Overall In my opinion it is a nice phone with great features available at such a low price.