Fixed Dialing Number (FDN) is a service mode of a GSM mobile phone 's SIM card. [1] Numbers are added to the FDN list, and when activated, FDN restricts outgoing calls to only those …

2021年10月19日 · Fixed dialing allows you to block outgoing calls (except emergency calls), while incoming calls are not restricted. Fixed dialing numbers (FDN) on the Android smartphone …

2025年2月11日 · When you turn on Fixed Dialing Number (FDN), you can only call numbers that are on your FDN contact. This helps improve security and ensures you only contact trusted …

2016年4月21日 · Fixed Dialling Number, or FDN mode, allows you to set up a list of phone numbers to which calls cannot be made, and the function even allows you to bar certain …

2023年12月11日 · Fixed Dialing Numbers, also known as Fixed Dialing Mode, is a common feature on GSM mobile phones that allows users to restrict outgoing calls to only a specific list …

FDN stands for 'fixed dialling mode' - the setting on a mobile phone which prevents the dialling of a number that does not match the data on your SIM card.

2020年10月13日 · Know more about FDN : A PIN code (numeric password) protects the allowed list of numbers from being changed by any person who does not know the PIN code. It is a …

2022年7月7日 · Fixed Dialing Number (FDN) is a service mode of a GSM phone’s Subscriber Identity Module (SIM) card. Numbers are added to the FDN list, and when activated, FDN …

2021年6月9日 · We can restrict and specify which phone numbers or numbers with area code are allowed to be dialed from the Xiaomi smartphone. Note: PIN 2 is required to enable or disable …

2025年2月19日 · In GSM phones, the Fixed Dialing Model (FDM) is a service mode for locking the phone so that it can only dial certain numbers or numbers with a certain prefix. Please find the …