The battle over the future of the SIM card heated up yesterday when Nokia threatened to withhold 'essential' patents if Apple got its way, and RIM is now lashing out at the Cupertino company as well. RIM claims in a letter that it's observed Apple representatives changing their company affiliation, allegedly in order to deviously cast proxy votes at an upcoming ETSI meeting. RIM claims that three supposed Apple employees have registered for Bell Mobility, KT Corp., and SK Telekom, and that they shouldn't be permitted to vote since ETSI rules prohibit voting by proxy. If it's true, it's the latest example of the companies using extreme rhetoric and actions to influence the ETSI and the nano-SIM standard. RIM has asked that the ETSI disqualify the representatives in question, and we'll let you know if anything comes of its accusations.