Your quest for SIM only deals unlimited data in USA will lead you to a few choices. You could opt for monthly unlimited plans with pay as you go SIM cards, which will of course include data or internet. You could opt for SIM cards that require you to pay by the day and you pay for every minute of your talk time, every text and every megabyte of data. All these can have unlimited data. What will vary is the cap on the data that you can get at higher speeds, ala 4G or 3G.
Before we share the plans of SIM only deals unlimited data in USA, let us present a caveat. These deals or plans are subject to change. The major networks and their resellers in the United States periodically and unfailingly review their offers. You may pay less or more for the features laid out in this guide.
Internet SIM
You can opt for SIM only deals that will offer you just internet. You would not get any talk time or text.

H2O Bolt 4G/LTE SIM Card costs $9.95 and you can opt for 2 GB at $25, 5 GB at $50, 7 GB at $70 or 10 GB at $90. You would get 3G and 4G/LTE speeds. You can opt for a standard SIM, micro SIM or nano SIM. All the sizes of the SIM cards from H2O cost the same. H2O is a reseller of AT&T.

AT&T too has an Internet SIM Card. It costs $24.95. It charges the same for standard, micro and nano SIMs. The plans are a little different from what H2O charges. You get 2 GB at $25, 5 GB at $50 and 8 GB at $75. You will get 4G LTE speeds.
Monthly SIM Only Deals Unlimited Data
Monthly plans are useful for those who use their phones extensively. You can get unlimited minutes along with unlimited data but the speeds will be throttled at a stage. Let us explore the various offers that are popular right now.

– Simple Special SIM Card is available for free but you do have to sign up for the two month plan. You get preloaded unlimited minutes or calls for the first two months, 8 GB 4G/LTE internet and unlimited national and international texts. The 8 GB high speed internet is split equally so you get 4 GB each month. Beyond the 4 GB cap every month, you would get unlimited internet but at EDGE speeds, which is not technically 2G network but a tad better 2.5G. Simple Special is a reseller on the network of T-Mobile.

– AT&T has an Unlimited SIM Card costing $19.95. There are two plans you can choose from, Plan North America and Plan USA. Plan North America will cost you $60 per month and get you unlimited calls within the states, to Mexico and Canada. You would get 6 GB of internet at 4G speeds and thereon unlimited internet at EDGE speeds. All incoming and outgoing and incoming texts to and from any mobile in the world are free. Plan USA will cost you $45 and get you unlimited calls within the states, you will have 3 GB of data at 4G speeds, outgoing and incoming texts are free to anywhere on the planet.

T-Mobile SIM Card costs $4.95 and you would get unlimited minutes, unlimited data and unlimited texts. There are five plans you can choose from. All plans are for two months. The first plan offers unlimited minutes and text messages within the country for $70. That is for two months. The second plan offers the same along with unlimited MMS and 3 GB of data at 4G speeds. You pay $80 for two months. The third plan increases the data to 5 GB at 4G speeds. You pay $100 for two months. The fourth plan increases the data to 10 GB at the same speeds for $120. The fifth plan gets you unlimited data at 4G speeds and you pay $160 for the two months. You also get unlimited international texts with this plan.

– NET10 Unlimited SIM Card costs $9.95. You would get unlimited calls and texts but not unlimited data. There is no throttling with this provider. You get the data that your plan offers. The plans start at $35 per month for unlimited minutes to anywhere in the country and unlimited texts. Data included in the plan is 500 MB. You get 4G speeds. The subsequent plans cost $40, $50 and $60 with the data being hiked to 1.5 GB, 5 GB and 7 GB. You can pay $65 to get 5 GB of data at 3G speeds and you also get unlimited minutes to Canada, Australia, Brazil, China, Denmark, France, Germany, Hong Kong, India, Ireland, Israel, Italy, Malaysia, New Zealand, Russia, Singapore, South Korea, Spain and the UK among many other countries. If you want 10 GB of internet at 4G speeds then you can opt for the sixth plan costing $75.

– H2O Unlimited SIM Card costs $9.95. This is not the internet only plan. You get unlimited minutes, texts and data. You can also get unlimited international minutes to more than fifty countries. In addition to the cost of the SIM, there are four SIM only deals unlimited data in USA from H2O. You can get unlimited national and international texts, minutes and MMS with 500 MB of data at 4G speeds if you pay $30 per month. You can get more data, 3 GB at 40 a Month, 4 GB at $50 per month and 4.5 GB at $60 per month. The plans have credits for international calling, of $10 to $20 per month including in the price you pay.

– Simple Mobile SIM Card costs $9.95. You get unlimited calls and texts but limited data with starter plans. You can go for unlimited texts and minutes by paying $50 for two months. You can get the unlimited talk time, national and international texts with 8 GB of data at 4G speeds, split equally for the two months, costing $80. You would get 4 GB of data each month. You can increase the data usage to 10 GB at higher speeds and thereon you can have unlimited data for two months at 2G speeds. This plan also includes unlimited texts and minutes. It costs $100 for the two months. You will have the 10 GB at 4G speeds split into two for the two months. The unlimited 2G data kicks in after you consume 5 GB every month. You can go for more data at higher speeds. Paying $110 for two months will get you unlimited texts and minutes along with 20 GB of data at 4G speeds. This is split into 10 GB each month. After consuming the high speed data, your internet speed will be capped at 2G. All these plans from Simple Mobile include free incoming calls, outgoing and incoming texts to and from any country in the world.

Ultra Mobile SIM Card costs $9.95. You can get unlimited national calls, unlimited national and international texts along with 1 GB of data at 4G speeds and a thousand minutes of international calls at $29 per month. You can get 2 GB of data at 4G and thereon unlimited data on EDGE for $34 per month.