Mobile phones making haraam sounds
Question

                What is your opinion of what we hear of the annoying ringing of mobile phones with a musical ring and their being so popular that they are even heard in the mosques?.
Praise be to Allah.Setting mobile phones to ring with a musical 
    tone is reprehensible and haraam, and it is even worse and more haraam if that happens in the houses of Allaah, namely the mosques, because that 
    is openly committing falsehood and haraam in that place, so the sin of the one who brings it with him is even worse in the mosque. It is known 
    that the Prophet  (peace and blessings of Allaah be upon him) stated that musical instruments are haraam, meaning the instruments that give 
    these musical sounds. These mobile phones have these sounds recorded in them which is repeated every time a call comes to the owner of the phone.  
    I wonder what will be recorded in the record of deeds of those who make their mobile phones play music in the houses of Allaah during the prayer, 
    and disturb themselves and others, and make the voice of falsehood and the musical instruments of the Shaytaan echo loudly in the houses of 
    Allaah.  
Do they not fear their Lord and repent to Him 
    and give up what they are doing and change this evil, especially when there is a permissible alternative in the other regular, non-musical sounds 
    that they can choose for the phone’s ring? 
We should note that the ringing of the 
    telephone, even if it is a permissible sound, should still be turned off before entering the mosque, so that it will not disturb the worshippers. 
And Allaah is the One Whose help we seek and 
    to whom we complain. There is no power and no strength except with Allaah.