While testing the Apple Watch Series 3 GPS + Cellular last night, I floated a crazy idea past iMore editor-at-large Rene Ritchie: What happens if you set up the Apple Watch on an iPhone, then swap that iPhone's SIM card over into an Android phone? Would the watch recognize that its paired iPhone SIM was no longer in an iPhone and stop working? Would it still work over a carrier's LTE connection? And more importantly: If it worked, what could it do? Well, because we embrace insanity here at iMore, we tried it. And, barring a bit of hacky behavior, it works.

I'm going to preface this write-up by saying that I personally think this is a terrible way to use the Apple Watch. Your battery life will most certainly be nonexistent because the watch solely relies on an LTE connection. You won't be able to get any fitness data on your Android smartphone. And you likely won't be able to access certain features like calling internationally or sending and receive SMS messages from your watch. Get an iPhone SE with Mint Mobile service for $30/mo How we did it

I used my iPhone 8 Plus on AT&T and an LTE Apple Watch Series 3, along with a loaner Galaxy S8 Active from Michael Fisher (of Mr. Mobile fame). After setting the Apple Watch up, we swapped my iPhone 8 Plus's SIM card into the Galaxy S8 Active and isolated the iPhone 8 Plus in Airplane mode so that there was no possible way for the Apple Watch to connect to the iPhone or remembered Wi-Fi networks. I accidentally crashed the Galaxy S8 Active the first time I held it because I apparently have that talent with Android phones; after that initial amusement, it took the Android device a few minutes to reboot and connect to AT&T. During that time, my watch showed a depressed "Disconnected," though it did attempt to connect to the (limited) cellular network inside our hotel in NYC. Once the S8 Active was connected, I went outside (to find a stronger cellular signal) with only my watch. To kickstart it, I swapped the watch into Airplane mode, then back out of it. Then I asked Siri to call my mother. It took Siri a few seconds longer than it has over past Series 3 queries, but Apple's assistant delivered — and a few minutes later, I was talking to my very-confused mum about technology testing.

We didn't stop there, however. Fisher and I then went up to our hotel's rooftop terrace and placed another call (to him), asked Siri a few queries, and checked for directions on the watch. We also sent an iMessage (!) to Rene, which delivered successfully even through cellular; it appears the watch has its own iMessage handshake protocol separate from iPhone when on cellular — even if your original phone SIM is living in an Android device.

I also had Fisher place an inbound call to me from his iPhone 7. The call displayed on both the Apple Watch and the Galaxy S8 Active; I then picked it up on the watch and we proceeded to talk for a short period of time. Wacky. Who might actually want to use this