Billing address not updated after change successfully submitted

I haven't checked since earlier this year, but if T-Mobile still isn't  allowing you to update your billing address (or change it to a PO Box as I mentioned also), the only solution I know of is to switch to a pre-paid account where you wouldn't get any mailed bills.   You either have to:

-Set up "auto-pay" for a pre-paid account by entering in your credit card number on the website. In that case they would have no reason to send you a mailed paper bill (either to your old or new address).   

-Or, every every month buying a T-Mobile card for your selected pre-paid plan monthly amount (T-Mobile cards available at grocery stores, Wal Mart, etc.), and then logging into your account before your due date to enter the card PIN number every month on the website.  I didn't want to give them my credit card number (since so many cell companies have been hacked before), so I'm just buying the pre-paid plan cards.  It is of course annoying to have to do that, but that way they also don't send any mailings to the home address (correct address or not).  Also, I'm only using the plan for a Net hotspot, not my cell phone, so it is no big deal if I miss the due date.  With a phone plan, I assume your service would also be inactivated until you entered a card PIN (big hassle, and might require calling them to reactive - don't know).  However, people who don't have credit cards do actually use the refill cards for phone service.  (T-Mobile's competitor Tracfone only uses credit card pre-pay or purchased cards [90-365 days & various data amounts] for cell service).

If you set up auto-pay with a credit card, you still have protection from your credit card company against fraudulent charges (if T-Mobile were hacked) or mistaken over-billing if you report it ASAP to your card company after you get your statement.  However the card company would have to investigate this with T-Mobile in order to adjust your credit card bill, so it still a big hassle if it occurs.  

However, in any case, if you move I would still try to update  the other address entry in your T-Mobile account for the "e911" address in the "My Profile" information, which may update.  That is so the police/ambulance/fire can locate you if you have to call 911 in an emergency and you are unable to give the 911 dispatcher your address.  (With an old landline the physical address for 911 response was obviously tied to your number by default.)  if you do this, the screen may show a confirmation green check mark indicating the change was made but you still need to go back to the My Profile address page to confirm is actually was done (or it may take some time - your can also check the next day).   If it doesn't update the e911 address, that is obviously a serious problem and I would go into a local T-Mobile store to elevate the problem (which may or may not work).

T-Mobile has other bugs that I told them about also that they haven't fixed.  For example, I'm supposed to get a confirmation e-mail whenever I enter the pre-paid card PIN, but I don't.  So I have to make sure to print out the screen with the confirmation number.  Also the account takes a few minutes for the pre-payment to register in your account - no big deal, but some people may be confused that it doesn't automatically show up.  You have to wait a couple minutes and refresh the account payment screen for your payment to show up as credited to your account.  They should just put a message on the confirmation screen stating this  (e.g. "It may take a few minutes for your account to be updated with the payment information.")

The problem is that the T-Mobile customer service representatives (either on the phone or at the local stores), don't seem to have the ability do handle problems like the billing address not updating (obviously a serious problem), and they don't seem to be able to elevate it to whoever does.  Or they enter the issue into their system to be elevated (and for you to get a response call or e-mail), and nothing happens.