Related Videos: Lower Back Strain Video. Lower back strain is caused by damage to the muscles and ligaments of the back. Learn about muscle anatomy and the symptoms of lower back strain. Back Strains and Sprains Video. A muscle strain or a muscle sprain in the back is the most common cause of back pain. A muscle strain happens when the muscle is over-stretched or torn, resulting in damage to the muscle fibers (also called a pulled muscle). 2  A lumbar sprain happens when ligaments are stretched too far or torn. 3  Ligaments are very tough, fibrous connecting tissues that connect bones together.
The invalid SIM card error is typical of the type of error you get if your phone is locked to a different carrier than what you have. Many people offer unlocking service and typically charge between US $5 and $15 plus shipping to unlock your phone.he invalid SIM card error is typical of the type of error you get if your phone is locked to a different carrier than what you have. Many people offer unlocking service and typically charge between US $5 and $15 plus shipping to unlock your phone.
If your Galaxy Tab can't detect its SIM card, you won't have access to your mobile network. The problem can be with the software or hardware on the Galaxy Tab or with the SIM card itself.When the SIM card is unavailable, you may also lose access to contacts whose information is stored on the card.ower Down. The SIM may not be detected because of a software error that occurred when the Galaxy Tab powered on. A simple restart may fix the problem. Power down the Galaxy Tab and then remove the SIM card.