Question: are bt and o2 the same company?
Answer: The company was rebranded as BT Cellnet in 2000, and it became a part of BT Wireless, a group of companies owned by BT. BT announced on 3 September 2001 that the BT Wireless business would be spun off from the main group as a newly listed holding company, mmO2 plc, operating under the "O2" brand.