Sky has added to the appeal of its current unlimited broadband and calls deal with a £25 M&S voucher offer.
Consumers signing up for Sky Unlimited Broadband & Calls over the internet now receive a free gift certificate in addition to six months' free service.
The broadband package offers up to 14Mb download speeds with an unlimited monthly usage allowance.
Subscribers also receive a free wireless router, allowing them to get online anywhere in the home, and are able to take advantage of free Wi-Fi minutes when out and about.
Sky Unlimited Broadband & Calls comes with inclusive weekend minutes to UK landlines, with customers required to pay a monthly line rental fee.
Ordinarily, the broadband deal is priced at £10 per month plus line rental.
However, the six months' free offer enables customers to save £60 during the introductory discount period.
From the seventh month of a 12-month contract, the price reverts to the standard £10 per month plus line rental.
Sky is currently running an alternative offer, for households signing up for broadband and calls alongside subscription TV services.
Any new customer bundling pay-TV with their internet and home phone package is entitled to receive a £100 M&S voucher, which can be used at the popular high street retail chain.
The offer applies to a number of packages, including those featuring premium TV services such as Sky Movies and Sky Sports.