I would like to reassure you that I have absolutely no affiliation with the company or the product that I mentioned, and I am sorry if my post reads like an advert.
My name is Jason and I do own a small software company based in Ireland, and I use the name of my company as my alias on many of the forums that I am a member off.
As you can see the company from which I bought the product from is based in Serbia, and as I said, I dont have any relationship with them other than I just bought one of their boards last week (I have attached an invoice to show that I am a paying customer).
While I am a professional programmer, electronics and playing about with Arduinos is one of my hobbies and nothing commercial.
I only wanted to give other users the benefit of the positive experience that I had with this product, especially in light of the fact that the official Arduino shield is no longer available, and that this board is compatible with the existing GSM library.
I spent some time researching this replacement, and I just wanted to give other users the benefit of my experience.
I have also attached a photo of my test setup for this board.
Anyway, I hope this clarifies my previous post somewhat.