I have a 5 line plan currently,
do I call in to switch or do they do it automatically?
Their website says:
LIMITED TIME: 1GB of 4G LTE is increased to up to 2.5GB 4G LTE data per line (for the same price) until 2016 when you buy 4 or 5 lines. (You’ll still see 1GB per line at checkout, but your billing statement will show 2.5GB per line. Automatically reverts to 1 GB after 1/2/16).
Either way, I'll take it. 2.5 gb is more than enough for the average user. The average user only uses 1.0 gb to 1.5 gb a month anyways. Won't be enough for data hogs, but hey, it's free!
edit: just had a chat with tmobile, I had to request this "plan change" but it's effective for all 5 of my lines starting next billing cycle. At $110 for 5 lines of 2.5 gb, it's cheaper to add more lines to get more data than say, pay more for data with 2,3 lines.