1. I do rather not believe, you will erase apps later and buy them. Sorry, nobody is acting like that.
2. Now and for ALL TIMES: It is NOT Samsung's error, but the bad behaviour of PHONE CONTRACTORS, if P-Bill is not active in your country. You have to call your providers then and make trouble there.
3. You know, I thought you have NO possibility to buy apps, but now you are telling me it is just about the ****ing credit card? That is hilarious. So, you do not want to trust Samsung. Who else not? Flight companies? Amazon? Ebay? What do you want to do then with your credit card? Just sit and fart on it? =)
Seriously, there are 5000 prepaid credit card providers in the world which offer no further costs than aquiring the prepaid credit card. Every gas station even has them. So, you can buy your apps with those prepaid credit cards and have NO problem with your data, because those are anonymus.
Nowhere in the world there is a solid base/argument for spoofing apps ... and never forget, those app programmers usually are NOT big companies, but small groups or individuals (freelancers) with an age between 20 and 45 years. So, spoofers are really ****ing up someone's monthly income.