Why does my network connection goes on and off every seconds?

Hi Taobat, it may be a temporal network connection issue, just power off and power on your phone, you will be fine. If the issue persist, you need to contact MTN support for assistant.

You can contact MTN Support via any of the channels below:
MyMTN App
Twitter: @MTN180 / @MTNNG
Facebook: @MTNLoaded
Instagram: @MTNNG
Live Chat: http://bit.ly/2OC5bHz
Email: customercareng@mtn.com
Call Center: 180 or +2348031000180 (if you are calling from abroad or another network)
WhatsApp: • 09033000001