First you have to enable NFC at the android settings. Then, you can communicate with tags by placing them in the bottom of the mobile phone.
I used NFC TagInfo by NXP on Google play to identify the tags in the first place.
I was able to format the tags and write data to them using NFC TagWriter by NXP in Google Play.In this example, I'm going to write plain text "hello" to the NFC tag.
I was able to read the tag using the same application and also by using other applications such as NFC Tools.