Motorola Xoom :: No Internet Connection On 4G LTE?

with a lack of Internet connection on their 4G LTE XOOM. I purchased my XOOM in October and except for one time right after I got it, I've always been connected to a wifi someplace. Last week I found myself at probably one of the few McDonald's that had no wifi. I didn't think that was an issue but it turned out to be. I spoke with the people at Motorola who couldn't diagnosis my problem so I'm supposed to send the unit back to them. In the interim I thought (and spoke to Motorola about this as well) that as a means of troubleshooting I would take it to Verizon to see if perhaps I had a bad sim card. The manager was a complete idiot (I'm being VERY nice here) and told me that sim cards do not go bad! At issue is that when the unit goes back to Motorola it goes back devoid of anything including my sim card. I called Verizon directly and the feeling I got from them was that they really wanted to resolve my problem and probably not send my unit back to Motorola. The tech was very nice but she couldn't get any internet working on my XOOM either. She is sending me a new sim card which should be here tomorrow. Let's hope it's as easy a fix as that. I do have the 3.2.6 upgrade on my unit and except for it sometimes freezing at boot up the past week or so I haven't had any other issues with it.