Subsidiary user on a cell phone plan is bound by arbitration agreement referenced in electronic signature at time that the subsidiary purchased the extended service.
Contra proferentum notwithstanding, the arbitration agreement's incorporation of successors and assigns and the inherently durational nature of the contract mean that after-acquired subsidiaries are parties to the arbitration agreement.
Present dispute is within the scope of the arbitration agreement, given the statutory presumption for arbitration and the terms of the agreement compelling arbitration of all disputes and claims between the parties.