SD card must be inserted into Samsung Galaxy phone. Some models (S21 series, S6, Note 10, Note 20) don't support SD card storage
Global ringtone can be set through Settings > Sounds and vibration > Ringtone. Custom ringtones can be assigned to individual contacts in Contacts app. Additional sounds can be added by tapping plus icon
Build number identifies software version and update date. Build number changes frequently, possibly monthly. Build number differs from version number in software specifics
Stock Android doesn't allow native icon changes, requiring third-party tools. Individual icon changes possible through launcher settings or shortcut makers. Icon packs can be applied through launcher settings or directly from packs
TTY stands for teletypewriter and enables text communication over phone lines. Originally designed for people with hearing or speech difficulties. Translates typed text into electronic signals for transmission
USB tethering option may be disabled due to faulty cables. Data saver mode can prevent USB tethering functionality. Software updates can sometimes disable tethering options