Blocked na po yan.
ganto mag check kung blocked na yung sim.
[Tested on Samsung]
Dial mo *#0011#, then select mo kung sim1 or sim2, kapag may nakita kang UL MCS1:<invalid> blocked na yan.
Na try ko na rin response splitting and implementing sni rotator. I assume na gumagamit sila ng usage based detection (sa certain ASN pag walang promos na naka subscribe) rather than detecting manually every payload