Over the past few days I've had trouble receiving text messages; some come in hours late and some never come at all. I'm wondering if there is something wrong with the network or if my Samsung Galaxy S II X is faulty? I just got it a month ago..
Not completely sure. Have you tried a battery pull? Take out the battery and the sim card for 30 seconds - 1 minute and reinsert and turn on the device. Sometimes this fixes some bugs on any phone. If you still have issues, it may be possible that you do not get network well in your area? Where are you located? If all fails, you might want to contact Customer Care or send the phone for repair (covered by your warranty).