Like most companys Tethering is not ALLOW:
Here is a copy of the FAQS :
25. Additional Terms for Data Plans and Features
The following terms apply to your data plan or feature (“Data Plan”). To the extent any term in your Data Plan expressly conflicts with the general Terms and Conditions, which also apply to your service, the term in your Data Plan will govern. Please read your Data Plan carefully.
1. Permissible and Prohibited Uses
Your Data Plan is intended for Web browsing, messaging, and similar activities on your device and not on any other equipment. Unless explicitly permitted by your Data Plan, other uses, including for example, tethering your device to a personal computer or other hardware, are not permitted.
Examples of prohibited uses include but are not limited to: (a) server devices or host computer applications, including continuous Web camera posts or broadcasts, automatic data feeds, automated machine-to-machine connections or peer-to-peer (P2P) file-sharing applications that are broadcast to multiple servers or recipients, “bots” or similar routines that could disrupt net user groups or email use by others or other applications that denigrate network capacity or functionality; (b) as a substitute or backup for private lines or dedicated data connections; (c) any activity that adversely affects the ability of other users or systems to use either Simple Mobile’s services or the network-based resources of others, including the generation or dissemination of viruses, malware or “denial of service” attacks; (d) accessing, or attempting to access without authority, the information, accounts or devices of others, or to penetrate, or attempt to penetrate, Simple Mobile’s or another entity’s network or systems; or (e) running software or other devices that maintain continuously active Internet connections when a computer’s connection would otherwise be idle, or “keep alive” functions. For example, you cannot use a Data Plan for Web broadcasting, or for the operation of servers, telemetry devices and/or supervisory control and data acquisition devices.