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.
Are you sure you took out the SD card, or the SIM card? The SIM card is needed for your phone to connect to the carrier's network and access the web. If you mistakenly took out the SIM card, try powering down, remove the SIM again, then make sure it's reinserted correctly again.Refer to the user manual to make sure you're doing it right.hy does my android phone saying invalid card . I tried to replace the SD card with something with more memory but the card was too big so i put the old one back in its place exactly how it was and i kept getting that message and now i cant text or call. 02-04-2015, 09:47 PM #2.