vouchers via SMS?

English as a Second Language English Vocabulary, Grammar and Idioms
1

Hi, can you please amend this:

Send your customers an SMS voucher as a discount or an additional service. With an integrated TAN-code such a campaign can be a transparent and effective marketing tool.

Many thanks,
Torsten[YSaerTTEW443543]

TOEIC listening, photographs: A consultation[YSaerTTEW443543]

2

Send your customers an SMS voucher for a discount or (on?) an additional service. With an integrated TAN-code, such a campaign can be a transparent and effective marketing tool.

3

Thanks a lot for this, Mordant.[YSaerTTEW443543]

TOEIC listening, photographs: Changing light bulbs[YSaerTTEW443543]