By SANCHESKA BROWN Tribune News Reporter sbrown@tribunemedia.net BLACKBERRY users can expect disruptions in their data service tomorrow, as BTC moves towards a 4G network, officials said yesterday. The company had originally planned the disruption in mobile Blackberry service and data for Sunday, but for unknown reasons, postponed it until tomorrow. BTC spokesman Marlon Johnson would not comment on why the scheduled upgrade was pushed back but did say it will not affect the December launch of the 4G network. "We had to push it off until Wednesday and at this point I do not want to say why but it won't effect the launch or any of our 4G plans. We plan on doing some upgrades to the system between 12am and 6am Wednesday morning. There may be a disruption in Blackberry service and internet service between those hours," he said. Mr Johnson said while no official date has been set for the launch of the 4G network, the company is hoping to roll it out before Christmas. He said the launch of 4G will pave the way for touch-screen Androids, BlackBerrys and the entire hi-speed smart-phone family which are turning the handheld devices into internet and entertainment providers.