最近renew都很快，我家9天就邮寄到家了。到期前一个月申请的

到期前6个月可以申请。最近变快了，免指纹的话2-3周就收到了。

越早越好吧，我们renew花了7-8个月吧

Once U.S. Citizenship and Immigration Services (USCIS) receives your renewal form, you can expect to wait 1.5–12 months for it to be processed

Hi currently I want to bring my brother to USA through scholarship but he need to work here how to change student visa to work visa after he came here, wait for your reply?