How to create Sprite from loaded texture

I'm trying to create a sprite from texture, it looks like this:

 SpriteRenderer renderer = this.transform.GetChild(0).gameObject.GetComponent<SpriteRenderer>();
 Sprite sprite = Sprite.Create(tex, new Rect(0,0,130,130), new Vector2(1, 1), 100.0f);
 renderer.sprite = sprite;

texture I create from byte [], which I load from network:

 Texture2D tex = new Texture2D (textureWidth, textureHeight);
 tex.LoadImage(data);

as a result I have broken sprite.

What am I doing wrong?