[Samsung Epic 4G Touch] Adreaver:
*edit: No idea what I originally typed as the header of this post. I was literally falling asleep as I typed this last night.

PSEUDO-GUIDE to all the carriers and their pros/cons.

Verizon:

+ Great coverage

+ Subsidized phones mean you get a new phone on contract for cheap

+ More LTE than all other networks

- Prohibitively expensive

- No unlimited data option available at any price

- Bootloaders are usually locked down tight meaning development is never assured...look at the newest S4 update

- No BYOD discount, even though Sprint phones can be flashed to Verizon (it's a pain in the ass, not worth the trouble for $90+ a month IMO)

Page Plus (Verizon MVNO):

+Great coverage (same as Verizon)

+ BYOD with your existing Sprint device (manually flashed)

+ Reasonably priced

- Limited to 3g speeds

- No subsidized phone pricing if you do need a new phone

- No unlimited data option at any price

- Voice roaming only (additional charge)

Verizon Prepaid:

** See Page Plus. Plans are priced differently, and BYOD is not supported but relatively easy. The other pros/cons are the same.

AT&T:

+ Great coverage

+ 4g HSPA and LTE, for great speeds all over the place

+ Able to use any unlocked GSM phone

+ Subsidized phone pricing, may be able to unlock the phone later for use on a different carrier

- Expensive, but not as much as Verizon

- Unable to bring your existing Sprint phone

- No unlimited data option available at any price

- Bootloaders are usually locked down tight meaning development is never assured...look at the newest S4 update

AT&T Prepaid (GO Phone):

+ Great coverage

+ 4g (? couldn't find concrete documentation one way or the other)

+ Able to use any unlocked GSM phone

+ Relatively inexpensive

- No subsidized phone pricing if you do need to buy a new phone

- Unable to bring your existing Sprint phone

- No unlimited data option available at any price

- No roaming (assumed from the way all the other MVNOs operate. If anyone has additional info, please post it and I will edit.)

T-Mobile:

+ Good coverage (depends heavily on area, check coverage map)

+ 4g HSPA and LTE. Speeds regularly over 15mbps down (Personal experience, HSPA+. No LTE in my area yet.)

+ Able to use any unlocked GSM phone

+ Phone financing (Make a down payment of anywhere from $25-$100 depending on phone, then anywhere from $5-$25 a month depending on phone. You wind up paying full retail but you own it outright, no contract.)

+ Inexpensive compared to other major carriers ($60-$100 depending on services and phone selection. S4 with early upgrades and unlimited data is $100/month.)

+ Oh yeah. Unlimited 4g data available for $70/line/month. $50/month gets you unlimited 2g with 500mb 4g, and $60/month gets you unlimited 2g with 2.5gb 4g.

+ WiFi calling/MMS (only on touchwiz though, FYI)

+ T-Mobile will unlock your phone for you after 3 months in good standing

+ Early upgrades available for an additional fee ($10/month, but it include insurance/etc which is $8/month without the early upgrades. So really $2/month.)

+ $30/month prepaid plan (Unlimited text, choose either 100min/unl data, or unl talk/500mb data)

- Coverage not very good in some areas. (Coverage for me is excellent, YMMV.)

- 2g (Edge) is slooow. Plan to use WiFi a lot, pay a bit more for more 4g access, or deal with it. 2g is fine for light browsing/email/etc, but won't cut it for downloads or video.

- Unable to bring your existing Sprint device

- Some devices (Nexus 4) more expensive from T-Mobile than they are at retail (play store)

Sprint:

+ ...They promised to have better speeds soon?

- Minimal LTE, no HSPA. WiMax deprecated and will be dropped "soon"

- Limited phone selection.

- No discount for BYOD

- Mediocre coverage (horrible coverage for me, ymmv.)

Cricket/Boost/Virgin Mobile:

+ Cheap. Like way, way cheap.

+ BYOD with an existing Sprint device

- Uses Sprint's network, so if Sprint sucks for you, so will these guys.

Ting:

+ Cheap. Like way, way cheap.

+ No plans, just pick the minutes/texts/data allowance you want and pay as you go.

+ BYOD with an existing Sprint device

+ Roaming on VZW (voice/text only, no data)

+ LTE (only on LTE devices, and only where there is LTE coverage on Sprint)

+ $6 to add a line

- Uses Sprint's network, so if Sprint sucks for you, so will Ting.

- No device insurance available

Simple Mobile/Straight Talk/etc:

+ Cheap. Like way, way cheap.

+ Use any unlocked GSM phone

+ Good coverage (uses AT&T network)

- Reports from users of being throttled after some amount of data (2gb, 5gb have been reported. No concrete info available.)