MetroPCS Communications (PCS) early Monday said it had a net loss of 93,237 wireless subscribers in the fourth quarter, sending shares down 2% in early trading. MetroPCS, which agreed in early October to merge with Deutsche Telekom (DTEGY)-owned T-Mobile USA, recorded a net addition of 197,410 wireless users in Q4 2011. "This is the first time PCS has lost subscribers on a net basis in Q4, which is typically its second strongest quarter behind