Look, I get why @jakeb81 thinks it's weird. Honestly, it sounds totally stupid. But I was so desperate to stop checking my phone that I tried clipping my empty pockets together. It actually made me pause and think before mindlessly grabbing for it. So yeah, I'll cling to any weird little win I can get.
Ever notice how the best fixes are often the dumbest looking ones? Like putting your keys in the fridge so you don't forget your lunch. We try these weird little physical blocks because our brains are on autopilot. The goal is just to break that automatic motion for a second. If a binder clip does that, it's not stupid, it's smart. It works because it makes you stop and feel silly, and that's the whole point.