First of all, I want to thank you for all the research. Secondly, this was in my mind too, that this number can’t receive calls from outside, perhaps because of the politics of the mobile provider. At least now I can be sure. I have read the wiki article also. Didn’t thought that would be a prepaid number. Thirdly, no, I haven’t tried texting the number. I presumed that won’t work either. Now I’m thinking to ask that person for another number, preferably a fixed one and hope it will work. Thank you again!