A lot of people think RadioShack should have made the transition to internet sales, but I think that they actually started failing earlier, when they expanded into a non-technical market. In the 80s and 90s I could go into a Radio Shack and buy resistors, fuses, soldering equipment, breadboards, various controllers and sensors, hard drives, processors: everything I needed to assemble an electronics project, fix a com…
Radio Shack actually tried to move back into resistors and Raspberry PIs, but nobody goes to a physical store to buy that stuff anymore.
Radio Shack wasn't large enough in most malls to offer a variety of home electronics like Best Buy, but cell phones were high margin and viewed as a commodity by consumers, which is why they moved into them. It isn't simple saving Radio Shack. They probably would have been better off splitting the brand into a small store (Radio Shack) and a larger box store where they could have competed more effectively.