Let me clarify first that Information technology is the need of today's people not Allah's. Allah doesn't need anything to reveal His message. He also doesn't need anything to preserve His revelations.
Yet, Allah has made use of other great technologies:
"The Angel Gabriel(pbuh)": He was used to reveal the Qur'an, ie. He brought the Qur'an from the Heaven to the Earth. He was way more faster than today's Communication technology.
"The Hearts of Sahabah and their Sincerity": Sahabah were used to record the Qur'an. Their sincerity prevented them from interpolating it. Their hearts were used to preserve the Qur'an in the initial stage until it was compiled into a book by Uthman (ra). Sahabah were also the main source of recording of Ahadith and the Sunnah.
"The Huffaz (people who memorize the Qur'an)": This technology was used to preserve the Qur'an after it was compiled into a book by Uthman (ra). This technology makes sure human interpolation is identified and corrected at source, thus preserving it.
These technologies (In addition to many other) appointed by Allah are so perfect that they remain perfect in any era. Eg. If some copy of the Qur'an has human-interpolated words, A hafiz can identify it then and there.
On the other hand, Communication technology that you are talking about is imperfect, insecure and subject to interpolation because it is open not only to the hypocrites but also the kuffar. For eg. If Allah had made use of Information technology to preserve the Qur'an, people would agree on a single database that was preserved from the age of Sahabah. To interpolate the Qur'an, all one had to do is hack the central database, and the Qur'an would have gone.
But these were the things chosen by Allah to preserve His message. If Allah willed, he would have surely used the Information technology, but he didn't, perhaps simply out of His own will.
And your Lord creates what He wills and chooses. Qur'an 28:68.
We all know that Allah doesn't do anything without a reason. But still, some knowledge is only with him.
They said, "Exalted are You; we have no knowledge except what You have taught us. Indeed, it is You who is the Knowing, the Wise. Qur'an 2:32.
And still questioning His choice will be nothing less than questing for the knowledge that might sometimes harm our Imaan (faith and belief in Allah).
O Allah, I seek refuge in Thee from the knowledge which does not benefit, from the heart that does not entertain the fear (of Allah), from the soul that does not feel contented and the supplication that is not responded." Sahih Muslim.
At the end, I would like to say that people of this era (era of IT) can think of this preservation as a miracle. As without much technology (particularly IT and communications that you talk about), Islam has managed to be preserved as is for 14 centuries. And by the will of Allah, It will be preserved until the end of time.
Indeed, it is We who sent down the Qur'an and indeed, We will be its guardian. Qur'an 15:9.
ۚ وَاللَّهُ عَلِيمٌ حَكِيمٌ (And Allah is the All-Knower, the Wise)
اللَّهُمَّ انْفَعْنِي بِمَا عَلَّمْـتَنِي وَ عَلِّمْنِي مَا يَنْفَعُنِي