Email update from zero 1:
Dear Customers
3. Slow Data Connection.
Some of you may experience very slow data connection even before the 3GB data consumption. We are aware that this is a technical problem and it will be rectified by this Sunday, 8 April 2018. If you still have problem, please email us again. Thank you.
Yours sincerely,
Zero1 Team
So 8 April 2018 they will do troubleshooting on their network?
