[CrackBerry Question]

After I fixed my Blackberry 9790 (initialization failed issue I saw solution video on youtube) when it goes standby mode(the screen off for battery save mode) it go to SOS and it says sim card error , when I turn off and then turn off , it search for network and then back to life,sometimes when it is standby mode the indicator shows that network coverage is ok and it off after while and when I put it on the charger it works well because the screen always on and shows the o'clock, I love my blackberry and I spend a month trying to figure it out how tho fix the first issue (initialization failed) and I was happy but I am now not , so please help me.