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Try to avoid "survivalist" forums discussing these radios. The SHTF / Survivalist forums tend to discuss illegal use of GMRS radio equipment. Furthermore, much of what is discussed on the survivalist forums is inaccurate including mods that typically will damage your radio equipment. Look for discussion groups that are technically oriented or forums shared by GMRS and HAM radio users. Although a HAM radio license does not grant access to GMRS frequencies, some HAM operators also have a family GMRS license and the majority of HAM radio operators are far more knowledgeable than any of the crazy folks over on the survivalist forums.