I've yet to meet an apartment key fob I haven't been able to clone with a 'universal' RFID cloner gadget I bought in Shenzhen for $150 a few years back and some

I've yet to meet an apartment key fob I haven't been able to clone with a 'universal' RFID cloner gadget I bought in Shenzhen for $150 a few years back and some blank cards of various frequencies. You can also link it to a Aliyun/Tencent Cloud account for compute power to crack some older/low-end encrypted tags. I even managed to successfully clone a HID badge from work that was supposedly clone-proof... Most landlords, in my experience, don't invest in the high-end RFID systems that have real security.