Hi, I am currently doing my undergraduate on Electrical Engineering but I am unsure which concentration will provide me with the most job opportunities
Some corps use telecom as a general word for any communication. So you can be a telecom expert but actually be involved with 5G 4G, Bluetooth and more. And some corps refer to Telecom as an exclusive expertise with Cellular technologies. I think it's better to brand yourself as IoT / communication engineer rather than just telecom. But because of tradition, you may find yourself in a position labeled as Telecom engineer or something similar.
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