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6. Make the installation persistent (_Install every time_) following step 3. at https://tails.boum.org/doc/persistent_storage/additional_software/#index4h2
4. Make the installation persistent (_Install every time_) following step 3. at https://tails.boum.org/doc/persistent_storage/additional_software/#index4h2
7. Download `signal-cli-0.12.4` and signature file, executing:
5. Download `signal-cli-0.12.4` and signature file, executing:
7. Now you can run any `signal-cli` command, refer to [man page](https://github.com/AsamK/signal-cli/blob/master/man/signal-cli.1.adoc) for help
6. Now you can run any `signal-cli` command, refer to [man page](https://github.com/AsamK/signal-cli/blob/master/man/signal-cli.1.adoc) for help.
**Replace $PHONE_NR with your phone number using the international format (e. g. +15758941234 for a number registered in Truth or consequences, New Mexico)**
_Tip: If you want to acquire an anonymous phone number for registering signal, one can do so using free temporary phone numbers for receiving text messages online. For example _**_https://quackr.io/_**_ is quite reliable service if you choose numbers of so-called "Western countries". Please note, that everyone can re-register your phone number with signal, revoking your access to your newly acquired number. Therefore _[_set a registration lock PIN_](#Registration-and-registration-lock-pin)_ immediately after successful verification. Receive/send messages **at least once every 7 days** in order to keep your number. _[**_Signal is changing the re-registration condition's forth and back_**](https://blog.privacyguides.org/2022/11/10/signal-number-registration-update/)_**, so this method might not work for keeping an anonymous phone number forever._**_ This is the reason why many of the freely available numbers can not be registered with signal w/o PIN, 'cause they already have been registered by someone else who subsequently set a registration lock pin. Be patient and keep trying newly added numbers should do the trick._
_Tip: If you want to acquire an anonymous phone number for registering signal, one can do so using free temporary phone numbers for receiving text messages online. For example _**_https://quackr.io/_**_ is quite reliable service if you choose numbers of so-called "Western countries". Please note, that everyone can re-register your phone number with signal, revoking your access to your newly acquired number. Therefore _[_set a registration lock PIN_](#Registration-and-registration-lock-pin)_ immediately after successful verification. Receive/send messages **at least once every 7 days** in order to keep your number. _[**_Signal is changing the re-registration condition's forth and back_**](https://blog.privacyguides.org/2022/11/10/signal-number-registration-update/)_**, so this method might not work for keeping an anonymous phone number forever._**_ This is the reason why many of the freely available numbers can not be registered with signal w/o PIN, 'cause they already have been registered by someone else who subsequently set a registration lock pin. Be patient and keep trying either lately or old added numbers should do the trick._