I believe you’re seeking the following information:
The Basic license is not an option in Flex. However, for CUCM, the licensing are still Basic, Enhanced, CUWL, and Essentials. The Basic license does not cover all phone models. The Enhanced license covers most phones, and for lower-end phones, enhance license can be substitute to lower tier
![NithinEluvathingal_1-1716209257677.png NithinEluvathingal_1-1716209257677.png](https://community.cisco.com/t5/image/serverpage/image-id/218717i9A135DE3E00E481E/image-size/medium?v=v2&px=400)