Hi there,
Today I have been updating the firmware in my ph 3 standard and for some raison the update failed. Now, when I turn on the ph 3 starting beeping without stop. Does somebody has had the same problem? . How can I have a solution !?

Possibly you had an internet connection interrupt while downloading the firmware. Can you delete the app and reinstall it and see if it asks you to update again.
Also in the Academy section of the app is the full manual and also relinking instructions in case you are not linked anymore.