I just got my first Core, new.
When I try to connect it to cloud via android app, it goes through all the LED sequences to breathing cyan, so it seems it is connected to cloud. However, it doesnt provide feedback to Android phone which is all the time “searching for cores” and eventually end up with “no cores found”. So, I cant claim the core this way to my account. Tried with two different phones, three different networks. Networks and phone are standard, nothing special according to troubleshooting section.
I planned to use cores in our products, I am now a little bit afraid it will not work once it arrive to customer.