No one likes dropping offline, especially if you need to stay in contact. Get expert tips for boosting your cellphone signal on iPhone or Android.

Visible has begun selling its new SIM kit at Best Buy, and it's hitting store shelves now after an initial online rollout.

As someone who tests phones for a living, my SIM card rarely stays in the same device for more than a month. On average, I’ve switched to a new smartphone around 10 times in the past year, and on more ...