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.
Best Answer: Your SIM card being dirty wouldn't stop it from turning on. You said it got quite wet, so it could be water damage. Go to here for support: http://support.apple.com/kb/ht3302. In terms of cleaning the SIM card, ho here: http://www.ehow.com/how_5932063_clean-si...Remember to only press lightly, as you don't want to damage the metal contacts on the card. If you need help on cleaning your iPhone itself, go here: http://support.apple.com/kb/HT3226.Source(s): support.apple.com ehow.com.ou said it got quite wet, so it could be water damage. Go to here for support: http://support.apple.com/kb/ht3302. In terms of cleaning the SIM card, ho here: http://www.ehow.com/how_5932063_clean-si... Remember to only press lightly, as you don't want to damage the metal contacts on the card.