Staff at Birthdays' Bury headquarters are locked in talks over a proposed move to Glasgow.
About 200 staff work at the office, but 90 of them are two weeks into a 30-day consultation with management over the proposal.
A move would combine core Birthdays functions with that of Gadgetshop - both chains are owned by tycoon Chris Gorman. Birthdays field staff and the logistics operation would remain in Bury.
Separately, Gadgetshop has been testing a Virgin Mobile stand at a small number of stores.
Further opportunistic mobile phone promotions will follow. It will also launch the RoboSapien toy this month, expected to be a bestseller.