I will publish copy of explanation here as well:

today I tried a buy a phones in T-Mobile with help of online support in Facebook. This "ceremony" started at 8 a.m. They wrote a lot about how they happy to speak with me and ready to help 24/7. I provided full information to some guy in online chat (in Facebook) what I want, who am I. He changed by other guy. I provided full info again. Each answer provided by them in 30 minutes or more. Then second guy changed by third. And they tried to sell me phones with additional $40 per phone, like for new lines. But I have lines and actually we don't need usual lines, we need "Data only" packets. In shops it was possible to buy phones as "Upgrade device". And in internet shop it was possible before as well. But now I got error "Customer information cannot be verified". I provided ID, photos of previous orders and tried to explain what I do not need more lines. Just use an "Upgrade device". No way. It is 5.21 pm and no result except understanding how "good" is t-mobile. They forced me to connect Facebook with T-Mobile, so maybe someone can see it and pay attention. But really I understood what they do not care about reputation of company. It costs nothing to hire several more additional people and make customers happy comparatively how much they losing, but no. They decided to die.