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You can set limits for the amount of data to be transferred before the USB modem application (Vodafone Mobile Broadband) shows a warning. Follow these instructions to select data usage limits.
Enter usage limit, go to 2a.
Select warning settings, go to 2b.
Turn balance check when connecting to the internet on or off, go to 2c.
2a - Enter usage limit
Key in the required amount of data.