Unlock Problems: Ultrasnow 1.2.5 on iPhone 4 (01.59.00)


i have iphone 4 01.59.00 baseband running ios 4.0.1 (i dont upgrade often) ultrasn0w 1.2.5 , keep getting "sim invalid" or similar error. switched new t-mobile sim card older t-mobile sim under same ios , managed unlock , use previous sim unsure of problem. have restarted , uninstalled/reinstalled ultrasnow dozens of times , have reset network settings of blank, nothing seems work. sim card using came microsim (so no cutting issues) , account activated already. ideas?
 

maybe faulty sim?
turned off 3g in settings?
 


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