9930 update software messed up roaming service
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BB 9930 7.1Bundle 9219 (v18.104.22.1687 ,Platform 22.214.171.124)
Got update software(Sprint or BB-dunno, not paid attention) few months ago in US. While in Canada visiting my relatives for awhile, roaming service messed up like 1X most of time not 3G(earlier software worked perfectly) While 3G on, texting hardly able to send or receive.. Want to go back last software/remove current software that messed up service.. HOW? Thanks