My number transferred but people still receiving msg with original SIM number
I have my new phone and SIM for a month so long enough for the number to transfer. I received confirmation my number had transferred and thought everything was sorted. Yesterday I friend text me to my old number which I received but when I sent a reply it was from a different number (I **bleep** the original SIM number). How is this possible and can it be fixed to I'm sending and receiving messages with the number I want?