I have a plantronics E243 earpiece and it works ok, I would be happier if it were louder. I have used a Motorola 820 and it was okay, I like how my plantronics piece inserts into my ear rather than the motorola that just hooks onto the outside of my ear. I have checked out Jabra and Jawbone, but there are so many versions. Jabra BT2080 & 2010, BT155, BT185 also Jawbone prime, endeavor, HX1, aliph. What is the best for the price? and what do all those codes mean? I thought most all were universal. If my service is with AT&T will a Verizon universal work?