Praise be to Allaah.
Firstly:
For one who is praying on his own, the adhaan is Sunnah, but
it is prescribed for him to do it in the case of a prayer that is being made
up, and he should perform it in full. So if it is adhaan for Fajr prayer, he
should say, “al-salaatu khayrun min al-nawm (prayer is better than sleep)”
twice, because it is part of the adhaan that is prescribed (for that
prayer). The fact that giving the adhaan is Sunnah for one who is praying
alone is the report narrated by al-Bukhaari (609) from ‘Abd al-Rahmaan ibn
‘Abd-Allah ibn ‘Abd al-Rahmaan ibn Abi Sa‘sa‘ah al-Ansaari from his father,
who told him that Abu Sa‘eed al-Khudri said to him: I see that you love
sheep and the wilderness. When you are with your sheep or in your wilderness
and you give the call to prayer, then raise your voice with the call, for no
jinn or man or anything within the voice range of the muezzin hears the
call, but it will bear witness for him on the Day of Resurrection.” Abu
Sa’eed said: I heard this from the Messenger of Allaah (peace and blessings
of Allaah be upon him).
Shaykh Ibn ‘Uthaymeen (may Allah have mercy on him) was
asked: What is the ruling on giving the adhaan and iqaamah for one who is
praying on his own?
He replied: Giving the adhaan and iqaamah is Sunnah for one
who is praying on his own, and they are not obligatory, because he does not
have anyone with him to call with the adhaan. But because the adhaan is
remembrance and veneration of Allah, and is a call to himself to prayer and
prosperity, (it is Sunnah) and the iqaamah, likewise, is also Sunnah. The
fact that it is mustahabb to give the adhaan is indicated by what is said in
the hadeeth of ‘Uqbah ibn ‘Aamir (may Allah be pleased with him) who said: I
heard the Messenger of Allah (blessings and peace of Allah be upon him) say:
“Your Lord wonders at a shepherd at the top of a mountain who gives a call
to prayer, and Allah says: ‘Look at this slave of Mine giving the adhaan and
iqaamah for prayer and fearing Me. I have forgiven My slave and granted him
admittance to Paradise.’” End quote from Fataawa al-Shaykh Ibn ‘Uthaymeen,
12/161
It says in Fataawa al-Lajnah al-‘Daa’imah (6/61): When
giving the adhaan for Fajr prayer, the muezzin says in the adhaan, ‘al-salaatu
khayrun min al-nawm (prayer is better than sleep)”. If I am on my own
and not in a group, should I say ‘al-salaatu khayrun min al-nawm’ in the
adhaan or not?
Answer: Yes, you should say it, because it makes no
difference with regard to the adhaan whether one is giving the adhaan on
one's own or with other people around, and because this is part of the
phrases of the adhaan that are prescribed for the adhaan of Fajr. End
quote.
Secondly:
It is Sunnah to recite out loud in Fajr prayer and in the
first two rak‘ahs of Maghrib and ‘Isha’, both for the imam and the one who
is praying on his own.
So if you pray Fajr on your own, you should recite out loud.
See also the answer to question no.
6130.
And Allah knows best.