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The iliotibial band, commonly called an IT band, is a fibrous tissue that rounds down the lateral side of the thigh from the hip to the knee. The purpose of the iliotibial band is to provide support for the knee and allow for greater stability during movements such as running or walking.he IT band is most active during movements that straighten the knee joint. Ad. Although the IT band is sometimes considered to be a muscle, itâs actually just a band of tissue and hence cannot be stretched in the same way that muscles can.
What is frequency band? Frequency bands are groupings of radio frequencies that are used by mobile networks to communicate with mobile phones. The frequency bands that a phone supports determine to a large degree where and on which networks it can be used. For example, T-Mobile USA uses the 1900MHz band for its GSM network, while AT&T uses both 1900MHz and the newer 850MHz frequency bands. Europe and most of the rest of the world use the 900MHz and 1800MHz frequency bands for GSM. So for a device to work properly on T-Mobile USA as well as work in Europe, it would need to support the 1900MHz band and one or both of the 900MHz and 1800MHz bands used in Europe.