I can't manually register to unlitext/unlicall using Huawei Nova 3i

[Android Central Question]

Hi po ask lang po. Hindi kasi ako makapag register manually. Yung tipong magttype ng UA25 then send to 4545 dba? pero ayaw nya. Kailangan ko pang mag *121#. Huawei nova 3i po cp ko. Please help me.