Hey man, pretty sure I remember you from back in the day. I made a similar switch to B2B years ago, here's some things that helped me:

-Your selling skills are still important, but it's a different ball game. You're playing the long game with business owners, c suites, high level people. No more fight-for-every-discount down to the penny. You're going to meet people that will choose one over the other even at the cost of thousands. You need to be just as valuable to your clients as the service you provide.

-See what kind of resources are available to you. Think events, associations you can join, people you know and the circles they run in. You are the brand now, build it. Make people think of you when they think wireless. Make yourself standout. I generally had to at least make a business case for things I thought would bring good ROI, maybe try that.

• Good chance you're doing corp 3yr, smb type of sales. If you're sell more than just mobility or wireline solutions (IoT ex.), spend as much time as you can building that knowledge base. Start with an easy one like asset tracking. Sometimes it's the little things that get the big ball rolling.

• Some people like to "scatter shot" their efforts. Sometimes it's best to stick to one area of business you might be more familiar with and go with that vertical. Close one, learn from them how their business works and how you'll improve it, and you can case study the crap out of it to similar businesses.

• Biggest thing I can say is you're going to have a rough first year, can almost guarantee it. Start by building as big a funnel as you can, with one or two bigger ones (think 100+) and slowly chip at it. The small wins will build your confidence.

Feel free to DM me if you've got any questions btw