Support Wifi goes dead

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http://androidforums.com – I have a problem with the Boost Mobile Samsung Galaxy SII. I connect to any wifi hotspot without a problem but after an undetermined amount of time, the phone just stops receiving signal from the wifi connection. If I disconnect and re-connect the wifi works great again. It seems to go dead after the phone goes to sleep or in powersave mode. Is there any known fix for this problem? Thanks (General)