After recent price hike announcements from AT&T and Verizon Wireless, T-Mobile is responding by giving these customers an irresistible offer. If you are among the affected customers, you can switch to Mint Mobile and get up to four additional lines free for three months. But is this a really good offer? Let’s do the math. Mint Mobile’s plans start at $15 per month. When you sign up for the offer, you won’t have to pay for the … [read full article]