This is in response to some claims made by guppies in the difference in sunni and shia qur’an thread. I did not want to fuel that thread or divert it so here’s a separate thread to discuss this important issue:
First off I’m no ‘Qura’nist’ I worship God Alone.. great difference..
As for the verse quoted, it’s out of context (favorite habit of most sectarians to justify their beloved hadiths).
The theory of ‘abrogation’ is a scholarly invention. It holds no water if you study the verse in context. Many scholars have debunked it, including but not limited to Muhammad Asad.
Here’s the verse in context.. please do read carefully:
[2:105] Those who disbelieve from among the followers of the Book do not like, nor do the polytheists, that the good should be sent down to you from your Lord, and Allah chooses especially whom He pleases for His mercy, and Allah is the Lord of mighty grace.
PakistaniAbroad: Pause for a moment.. reflect. What ‘good’ was being sent down to the believers? It was the Holy Qur’an. Thus the topic is already established.. it’s the chagrin of the disbelievers and mushrikeen over the believers chosen to receive Allah’s communications. This new book, one-upped the Torah and the Bible and naturally the followers of the Book were peeved that their books were being superceded.
Now read the next verse and things get crystal clear:
[2:106] Whatever communications We abrogate or cause to be forgotten, We bring one better than it or like it. Do you not know that Allah has power over all things?
Pretty clear now that the verse is discussing how the Qur’an has overtaken earlier scriptures and now supercedes them.
The sectarians have started misinterpreting it to claim the Qur’anic verses are abrogated 
all because of their belief in post Qur’anic fabrications and their desire to uphold them over what they received in the shape of the Qur’an.
“But wait!” the sectarian might say.. “what about this?”:
[16:101] And when We change (one) communication for (another) communication, and Allah knows best what He reveals, they say: You are only a forger. Nay, most of them do not know.
PakistaniAbroad: Once again the verse alone might cast doubts as to how to interpret it and most sectarians would use it to prop up their ‘abrogation theory’ again.. but once again we will study it in context and understand the meaning :insha:
Let’s pick up the clues from 16:101
[16:101] And when We change (one) communication for (another) communication, and Allah knows best what He reveals, they say: You are only a forger. Nay, most of them do not know.
The part in bold is key to understanding the message of the verse. People accuse the prophet of being a forger and hence the Qur’an of being a forgery. Not just one verse of it.. cuz the disbelievers rejected the whole Qur’an.. not single verses. Thus “the communication” that is being discussed is The Qur’an. not one verse of it.
Now let’s search the Qur’an for a confirmation of the same and indeed Allah helps us understand His Qur’an if we want to:
[38:1] Suad, I swear by the Quran, full of admonition.
PakistaniAbroad: context established.
[38:2] Nay! those who disbelieve are in self-exaltation and opposition.
[Shakir 38:3] How many did We destroy before them of the generations, then they cried while the time of escaping had passed away.
[Shakir 38:4] And they wonder that there has come to them a warner from among themselves, and the disbelievers say: This IS an enchanter, a liar.
[Shakir 38:5] What! makes he the gods a single Allah? A strange thing is this, to be sure!
PakistaniAbroad: Context confirmed.. it’s people who do not believe challenging the new concept introduced to them through the Qur’an.
[Shakir 38:6] And the chief persons of them break forth, saying: Go and steadily adhere to your gods; this is most surely a thing sought after.
[Shakir 38:7] We never heard of this in the former faith; this is nothing but a forgery:
PakistaniAbroad: 
we found our clue. So this is what 16:101 is discussing.. This is when peole called the Qur’an a forgery and the Prophet a forger.
All clues thus pointing to the fact that the change in communication is about Allah’s previous communications and the latest and last communication The Qur’an.. not discrepancies within the Qur’an or some ill found theory of abrogation.
[10:15] And when Our clear communications are recited to them, those who hope not for Our meeting say: Bring a Qur’an other than this or change it. Say: It does not beseem me that I should change it of myself; I follow naught but what is revealed to me; surely I fear, if I disobey my Lord, the punishment of a mighty day