title: how to write data into MifareClassic Tags?
body: <p>I am very newbie to NFC Android. Now I am doing Project on NFC which has to Write NFC Tags with secured Data. So here My app should support all forum tags and MifareClassic, Mifare Unltralight Tags. I got a sample from tapintonfc blogspot and which is working for all nfc forum tags but not with the MifareClassic. So I found in the documentation writing data in MifareClassic Tag. I Understood that MifareClassic contains Sectors and each Sector has 4 blocks in which one block is used to store keyA,keyB for authentication. So My doubt is Can i store contactData and call/sms data into a single MifareClassic Tag. if yes, how?. My second doubt is if Card will store one data (either contact or call/sms) at a time, then if my contact data is of 400bytes then how to store it in the sectors. It is clear that we can use 48bytes of space per sector. Please some one clear my doubts.</p>
  
  <p>Thanks in Advance</p>