Turning off BIS turned off any data/multimedia capability required to receive/send MMSs/ picture messages on phone.
I spoke with customer service/technical support that instructed me I still should be able to view picture messages from special ATT website
/1 and each time someone sends text message to me I should get notification with message id and password. Unfortunately it does not work. And neither person sending MMS to me won't get reject notification or anything.
Called customer service, they did test by sending MMS to me but they were not much of help