my carrier logo was simple 21201 with numbers, i used roaming on other country TMOBILE MK , and there i tried to change tmobile's logo with customize but nothing happened, so now at home even i don't have tmobileMk network i still have this logo on my phone, when i search for networks it shows my home network and others i click on 21201 but logo remains same tmobileMk.
anyway to change back to 21201