No
Ok, so here is plot of the price per month versus the data plan. From this plot we can see that the y-intercept is $65.33 and the slope is $5.42 per GB. You can also see that the jump in price from no data to 200 MB is crazy out of proportion. So, the $65.33 must be how much you pay for unlimited voice and text. T-Mobile also offers different data plans for 500 minutes of talk.  Level 1 (0 points). Sure roaming charges are up to the carriers but so are Blackberry's roaming charges. The fact is that the way the Blackberry works does not cost anything like the way the iPhone works unless you catch on that you have to rely on wifi when travelling. That said I love my iPhone. Level 6 (13,730 points). it is the smart thing to keep data roaming OFF (which is why it is the default). Level 1 (0 points). I did not believe people who said charges were high when travelling. One week away has taught me that they are not high, roaming charges are astronomical. T-Mobile unveiled the latest part of its Uncarrier initiative today: the carrier is offering unlimited international data and text services at no extra charge starting October 31st.  With the new data plans, whiel the phone is roaming (in the US) do you get any extra charges or is it just international roaming?  There are two ways to access the internet via your mobile while abroad. You can use your mobile's 3G or 4G signal, in which case you'll pay your mobile provider (a lot) for data usage. Or you can connect via Wi-fi, wirelessly hitching up to a local broadband connection. If you can, it's best to switch off data roaming and rely on Wi-fi when you need it.  No. Regardless of whether you're using Ting on a GSM or on a CDMA network, there is no charge for domestic roaming. While your phone may sometimes show a roaming notification, you aren't incurring any extra cost or roaming charges for voice or text messaging. Ting does not currently offer domestic data roaming. That means you won't have access to mobile data until you're back in a network coverage area.  A. Pay-per-use rates for voice calls made or received in the Gulf of Mexico are $0.79 per minute. Charges will be displayed in the domestic section of your wireless bill. Pay-per-use rate for data usage in the Gulf of Mexico is $.010 per KB. Charges will be displayed on the International section of your wireless bill. Cost and minutes depend on which plan you select.”. An extra 30 roaming minutes cost $5 per month on all plans, 70 roaming minutes cost $10 on all plans and 120 roaming minutes cost $15 on all plans. This pricing is cheaper than roaming with unlimited wireless carrier MetroPCS, which charges a flat rate of 19 cents per roaming minute. With MetroPCS, 120 roaming minutes would cost you $22.80 instead of $15 with Cricket. Domestic data roaming occurs when you travel outside of T-Mobile's network coverage, using wireless data from another carrier. There's no added charge for the service. You'll receive a usage alert when you've reached 80% of your monthly domestic data roaming usage; then you'll receive a second alert when you've reach 100%. This depends on your data plan option. In general, the larger your full-speed data allotment, the more domestic data roaming you have access to each month. 
http://www.wired.com/2011/06/how-much-does-your-data-cost/ https://discussions.apple.com/thread/1777709?start=0&tstart=0 http://www.theverge.com/2013/10/9/4821692/t-mobile-announces-unlimited-global-data-roaming-at-no-extra-charge https://community.verizonwireless.com/thread/786824 http://www.moneysavingexpert.com/phones/cheap-roaming-calls http://ting.com/coverage http://www.wireless.att.com/learn/international/roaming/faq.jsp http://cellphones.about.com/od/roamingpoliciesbycarrier/qt/cricketroaming.htm https://support.t-mobile.com/docs/DOC-3299
does data roaming cost extra