That being said, I'm going to think of a number from 1 to 1,000,000. According to you, God will know what number I'm thinking of. Since you can communicate with God, I'd like you to communicate to him that you want to know what number I'm thinking of. Since you say God wants us to believe he exists, then he must want me to believe he exists. And since I need some sort of reasonable evidence that a fully omniscient and omnipotent being exists before I'll believe such a being exists, then God will know for me to believe he exists, he'll would have a need to present such evidence. Since you say God can communicate back with you, then God should communicate back to you what number I'm thinking of. I then want you to post that number in this thread.
A failure on your part to produce the number I'm thinking of means at least one of the following:
1) You can't communicate with God
2) God can't communicate with you
3) God doesn't know everything
4) God doesn't want me to believe he exists
5) Either you or God (or both) are hard-headed and/or stubborn