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!)
Answer from Blundell on Stack ExchangeSMS messages from one contact displayed as "null" - Android Enthusiasts Stack Exchange
Getting null in message
apex - The assigned variable shows 'null' in the WhatsApp - Salesforce Stack Exchange
What does “null” mean and why is it here
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 could also check on http://www.google.com/contacts and check if the address book entry for that person is missing some information.
When I check the my whatsapp there is null in the chat for some chat bot.