If you are receiving attachments (pics) and have an Android phone, there is currently an exploit (nicknamed StageFright) that allows people to send you malware via text message.
Phone manufacturers will release a fix for this in the future, but currently the only fix is a workaround.
The workaround is to disable auto-retrieve under MMS or multimedia messages. The instructions to disable that can vary based on your model phone, but it usually is something along the lines of:
. Go to your text messaging app
. Go to settings
. Look for MMS or Multimedia messages
. Disable or uncheck Auto-retrieve
There is a brief tutorial here as well...
This does not apply to iPhones or iPads.
If you have an Android phone it's recommended to disable that setting. Again, Android phone manufacturers will patch this in the future so be sure to install security updates and system updates for your phones as they appear.