The interesting thing is not that T-Mobile created placeholders on both its internal and external systems in the United Kingdom, because that is pretty standard at this point, but rather it thinks there needs to be an “8GB iPhone X” placeholder. This runs counter to what we heard for iPhone 5 sizes, so perhaps the ‘X’ is a new model 4S stripped down to 8GB? Or, maybe it is just guessing.
We will know for sure in a few short days.
P.S. We have a strong suspicion this is not the last T-Mobile news you will hear today.