There are many good knee stretches that one can try to help their knees. Some stretches include step ups, abductor raises, wall slides, hamstring stretch and straight leg raises.
Some good stretches would be the simple ones such as touching your toes or doing sit ups / curl ups. I also recommend visiting your doctor about this.
Some good running stretches for running would be to stretch your hamstrings, quadriceps, head to buttocks. Many more stretches can be found at http://www.coolrunning.com/engine/2/2_1/126.shtml.
any gymnastic stretches would probably be best.
No Sprint does not sell a rugged smartphone. They do however have some great covers that can protect your phone under harsh conditions.
A lunge, touch your toes, and stand on one foot and hold the other.
Some stretches are stratle, pike, right split, left split, middle split, and bridge.
With one foot behind the other and reaching for your front foot is a good one. there is also the splits BUT DON'T DO IT 'TILL YOUR WARM!!!
Sprint have a section on their website on careers and the benefits of working for Sprint. The website "Indeed" also contains some information on working for Sprint from employees of Sprint.
Cheerleading Stretches help almost every part of your body, there are multiple stretches you can do with your legs, arms abs and back. With cheerleading stretches you will become slimer and stronger.
There is really no straight answer about names of stretches. I found the best stretches to before serving no matter if it is jumping or just using your arms and weight. The best thing is to stretch out your shoulders, arms, back and your legs. BUT THE ARMS AND SHOULDERS I FOUND OUT TO BE MOST IMPORTANT when stretching for serving. For actual stretching names and descriptions I would just go and search for shoulders and arm stretches. Squats and Lunges are good for the legs at the beginning of warming up.
No. Sprint however, has made some deals with some carriers in Mexico. I believe Telcel is the name of the company that provides phone service to Sprint users nowadays.