The mobile network Giffgaff is offering customers affected by last week's data outage the opportunity to donate refunded airtime to charity.
More than 30 million people were affected when mobile operator O2's data network went down.
O2 provides mobile services for other companies, including Giffgaff, whose customers were also affected.
Ash Schofield, chief executive of Giffgaff, posted on the company's community forum that he intended to set aside a goodwill fund.
Schofield said those affected by the outage could register for a share of the fund by Friday.
They could then choose to either take a share of the fund as credit or donate their share to charity.
Giffgaff, which has 2.5 million customers, has yet to reveal the value of the fund or whether those who apply will be able nominate their own charities or have to donate to one selected by Giffgaff.
"I’ll update you again on next steps on Monday 17th," wrote Schofield.
"I’d like to say sorry again that this has happened. We let you down and that’s never something we want to do."
A Giffgaff spokeswoman told Third Sector it did not currently have a charity partner, although it supported Adoption UK on Giving Tuesday last month and was involved in other charity initiatives.