Complicated H1 transfer - Upgrade to Premium Processing

[NLS]

I have applied for my H1 transfer from employer A to employer B on September'2011 and my initial visa is about to expire in the next 15 days. There was an RFE from USCIS which my employer replied in Apr'2012. I havent heard back from the USCIS since then. When our employer called they said he will notify the corresponding officer and they sent a letter saying you should have a response in 45 days. Since my visa expires in next 15 days should I upgrade my application for premium processing or wait for USCIS to reply back. Hope to hear back from you. Thanks.

[SameerH1Bworker]

Visa expires meaning, your stamp visa on passport or I-94? If your I-94 is valid for longer time then you're fine to stay. Visa stamp is just to enter in US, but once you entered in US your I-94 dates is your validity dates.