First type in #7465625*638*+Unlock code# The 8 digit code can be obtained by calling the mobile operator and by giving them your imei. Phone should say: network lock deactivated. Hope this will help you
you will need to either have ringtones on your computer already, or use myxer.com if you already have ringtones on your computer, you will need to upload it and either send it to yourself via SMS or send yourself a "jump code" and point your phones browser in the right direction. you can do that by going here http://rumkin.com/tools/sprint/. select your phone as the samsung upstage, upload your mp3 to this site, then send to phone... But best advice is BUY A NEW CELL PHONE samsung instinct software is full of bugs and problems
Try to change your settings like this follow Menu > Installations > App. Mgr. > Options > Software Installation > All . If that doesn't work also try this Set online certificates to OFF, then if it still does not work, try setting your date a year or two back,install, then just configure to current date again.Hope it will help