r-sim 10+ sms center


hi,
i have iphone 6+ us t-mobile 9.2 – I’ve unlocked via r-sim 10+ (IMSI mode) but i can’t change sms center number –

I’ve tried **5005*7672*+445005000# – but when enter *#5005*7672# – i still have +8613800395500

any advice ?