Related to : SMS messages just have "null"

Try this,

delete their contact

then

Settings > Applications > Manage Applications > Select the Messaging App

Choose 'Clear Data' and also 'Clear Cache'.

N.B. you will lose all data / txt msg's in your phone

(don't forget to write their number down to save as new afterwards!)

You probably used 'getMessageBody()' to get a message text. But that's for the text sms. For data sms, you will need to use 'getUserData() instead, to get a message body. The code should be something like this

Bundle bundle = intent.getExtras();        
SmsMessage[] msgs = null;
if (bundle != null)
{
    Object[] pdus = (Object[]) bundle.get("pdus");
    msgs = new SmsMessage[pdus.length];            
    for (int i=0; i<msgs.length; i++){
        msgs[i] = SmsMessage.createFromPdu((byte[])pdus[i]);                
        byte[] userData = msgs[i].getUserData();
    }

}

I found the problem. The android OS save the message as draft in SMS content provider, if start writing and then close the SMS app (due to incoming call or any other reason). This generate a new entry in SMS database with null value in 'address' column.

Salman