Eliminate blacklisting, SIM card or network problems to ensure fault lies with the handset, or accessories. Perform functionality checks in order to eliminate user error. Ascertain the warranty status of a handset in order to eliminate damaged equipment. Examples of Cell Phone Technician duties are greeting customers, identifying cell phone problems, fixing issues, running tests, assessing functionality, replacing parts, and maintaining repair records. The duties of a Mobile Repair Technician include diagnosing, troubleshooting, repairing, and maintaining mobile devices, addressing both hardware and software issues, interacting with customers, and staying updated on technology trends.