The reward for the muezzin and the one who gives the iqaamah

In the Sunnah there are reports that indicate that the
muezzin has a status the like of which no one else will have. For example: 

1 – It was narrated from ‘Abd al-Rahmaan ibn ‘Abd-Allaah ibn
‘Abd al-Rahmaan ibn Abi Sa’sa’ah al-Ansaari, that his father told him that
Abu Sa’eed al-Khudri (may Allaah be pleased with him) said to him: I see
that you love sheep and the countryside. When you are with your sheep or in
your countryside and the time for prayer comes, then raise your voice with
the call to prayer, for no jinn, human or anything else hears the voice of
the muezzin as far as it reaches, but he (or it) will testify for him on the
Day of Resurrection. Abu Sa’eed said: I heard that from the Messenger of
Allaah (peace and blessings of Allaah be upon him). Narrated by
al-Bukhaari, 584. 

2 – It was narrated that Mu’aawiyah (may Allaah be pleased
with him) said: The Messenger of Allaah (peace and blessings of Allaah
be upon him) said: The muezzins will have the longest necks of the people on
the Day of Resurrection.” Narrated by Muslim, 387. 

Al-Nawawi (may Allaah have mercy on him) said: 

It was said that this means that they will be the people who
most expect the mercy of Allaah, because the one who is expecting something
cranes his neck to see what he is longing for. Or it may refer to the
abundance of what they will see of reward. Al-Nadr ibn Shameel said: When
the sweat comes up to people’s faces on the Day of Resurrection, they will
crane their necks lest that torment and sweat reach them. And it was said
that it means that they will be masters and leaders, as the Arabs describe
leaders as having long necks. And it was said that it means they will have
more followers. Ibn al-A’raabi said: it means the people who have the most
good deeds to their credit. Al-Qaadi ‘Iyaad and others said: some of them
narrated it as i’naaqan (instead of a’naaqan, meaning necks), meaning that
they will be the swiftest to enter Paradise. End quote. 

Sharh Muslim, 4/91, 92 

3 – It was narrated that
Abu Hurayrah (may Allaah be pleased with him) said: The Messenger of Allaah
(peace and blessings of Allaah be upon him) said: “If the people knew
what there is in the call to prayer and the first row, and they had no other
way but drawing lots, then they would draw lots.” Narrated by al-Bukhaari,
590; Muslim, 437. 

The meaning of this hadeeth is that if the people knew what
there is of great and abundant reward in the call to prayer and the first
row, and they could not find any way to do the adhaan and determine who
would stand in the front row except by drawing lots, then they would do
that; they would draw lots in order to attain its virtue. 

4 – It was narrated from al-Bara’ ibn ‘Aazib (may Allaah be
pleased with him) that the Prophet of Allaah (peace and blessings of
Allaah be upon him) said: “Allaah and His angels send blessings upon the
front row, and the muezzin is forgiven as far as his voice reaches, and
whatever hears him, animate or inanimate, confirms what he says, and he will
have a reward like that of those who pray with him.” Narrated by al-Nasaa’i,
646; classed as saheeh by al-Mundhiri and al-Albaani, as it says in
Saheeh al-Targheeb, 235. 

With regard to the reward for the iqaamah, this is included
in the ahaadeeth quoted above concerning the virtue of the adhaan, because
the Prophet (peace and blessings of Allaah be upon him) called the
iqaamah an “adhaan”, as in the hadeeth: “Between every two calls there
should be a prayer.” Narrated by al-Bukhaari, 598; Muslim, 838. 

Al-Haafiz said: The words “every two calls” mean the adhaan
and iqaamah. End quote. 

There is also a hadeeth which speaks specifically of the
virtue of the iqaamah: 

It was narrated from Ibn ‘Umar (may Allaah be pleased with
him) that the Messenger of Allaah (peace and blessings of Allaah be
upon him) said: “Whoever gives the call to prayer for twelve years will be
guaranteed Paradise, and for each day sixty hasanaat will be recorded for
him by virtue of his adhaan, and thirty hasanaat by virtue of his iqaamah.”
Narrated by Ibn Maajah, 728; classed as saheeh by al-Mundhiri and
al-Albaani, as stated in Saheeh al-Targheeb, 248. 

And Allaah knows
best.