Answered by Shaykh Muhammad ibn Adam al-Kawthari
Is it permissible to use mobile phones in mosques with Islamic tunes. In Masjid-E-Khaif (in Mina), during Hajj, women stay in the women’s mosque and men stay in the men’s mosque (usually those who live in K.S.A and go on their own not through any agent). It becomes easy to contact one’s mahram on a mobile phone, though the man can go to the door of the women’s section and tell his name to the guard and then He/She can call his name on the loud speaker.
It is not appropriate to use cell phones in Masjids, unless absolutely necessary, for it entails disturbing those who are engaged in worship (ibadah). To harm and disturb another individual is a sin in itself, let alone when one is engaged in an Ibadah, such as offering Salat.
Allah Most High says:
And:
The solution to the problem in Hajj is that, one may contact one’s family by going out of the Masjid and using the phone. The one who is being contacted should keep his/her phone silent, as not to disturb others who are engaged in worship. Thereafter, he/she may go out of the Masjid and answer the call.
And Allah knows best