I attended the 5-day cell phone repair training to earn the Cellular Master Technician (Level I, II, II) rating. I do not believe you can call yourself a true cell phone or tablet repair professional without taking this course. Regardless if you have some experience or currently in the business, this course is worth the investment. Upon return to your shop/business the training will pay off. This training will not only increase your repair skills but also help guide your business establishment and development. Some of the best training I have ever attended. Frank is in the top 1% of instructors I have ever had the pleasure of learning from.