It is confusing. But, this is whats happening.
Send:*147#
Receive:Cell C Customer Menu:
-----------------
1-Data Settings
2-Data Bundles
3-Balance
4-Customer Details
5-Product Info
6-Block SIM
7-BlackBerry
8-Please Call Me
9-PhotoCode
Send:2
Receive

ata Bundles
-----------------
1-R50 for 100MB
2-R100 for 250MB
3-R150 for 500MB
4-R250 for 1.2GB
5-R400 for 3GB
0-Back
Send:3
Receive:To activate a 500MB bundle, ensure you have R150 airtime available to cover the cost. Then dial *101*4*150# after ending this session.
so, the actual command to reload .. *101*4 is to tell it to load data, and the amount .. 150, 250 or 400, is how much data you actually want.
I am using about 3gb every 5 days (I know), its a lot - but, I download a lot of financial data.
I often get ..
Send:4
Receive:Time out
error msg, but, eventually, after up to 10 tries, it goes thru.
and u get
Send:*101*4*400#
Receive:Your request has been processed successfully. An SMS will be sent to you shortly. Cell C, the power is in your hands