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.
Last Update date : 2015.04.16. Note: Only Nano-SIM cards work with the device. 1. Insert the ejection pin into the hole on the SIM card tray to loosen the tray. Ensure that the ejection pin is perpendicular to the hole. Otherwise, the device may be damaged. 2. Pull out the SIM card tray gently from the slot. 3. Place the SIM card on the tray with the gold-coloured contacts facing downwards. 4. Insert the SIM card tray back into the SIM card tray slot. Ensure that the tray is closed tightly to prevent water and dust entering the device.