Attorney Murthy :

One who starts work based on filing a new H1B petition, per USCIS / INS policy memos and letter opinions, is allowed to return to work for the earlier employer on the prior H1B petition approval if the earlier employer has not revoked that earlier H1B petition and that earlier employer is still willing to offer the person the earlier job. The other alternative when one has failed to maintain status in the U.S. is for the person to file another H1B with a third employer, but then the individual has to travel abroad and reenter on H1B status with the latest H1B approval notice if the earlier visa stamp has not expired in the PP. In the alternative, one must apply for a new visa stamp from abroad and show the latest H1B approval notice at the port of entry to obtain a new I-94 card showing H1B status with the correct expiration date.