2016 Airtel data plan,etisalat data plan,mtn data plans and bundles,glo data plans and bundles.
Airtel data bundle
Airtel data plans

AIRTEL
1.5GB ₦1,000 *496#
3.5GB ₦2,000 *437#
4.5GB ₦3,500 *438#
Dial *121# for more plans.
Also: Check out how to get up to 5gb on airtel with just 500 naira
Etisalat mobile data plan
Etisalat data plan

ETISALAT
1.5GB ₦1,000 -*229*2*7#
3.5GB ₦2,000 -*229*2*8#
4.5GB ₦3,500 -*229*2*9#
8GB ₦8,000 -*229*2*5#
10GB ₦10,000 -*229*4*1#
Dial *229# for more plans.
Also : Check out new etisalat cheapest data plan

Mtn data bundles
Mtn data plan
MTN
1.5gb. #1000. *131*1*3*1#
3.5gb. #2,000. *131*1*3*2#
10gb. #5,000. *131*1*3*3*#
22gb. #10,000. *131*1*3*4#

Also : Check out MTN new special data bundle

Glo data bundles
Glo data plans
GLO
1.5GB ₦1,000 -*777*1*1*2*1#
3GB ₦2,000 -*777*1*1*2*2#
5GB ₦2,500 -*777*1*1*2*3#
6GB ₦3,000 -*777*1*1*2*4#
9GB ₦4,000 -*777*1*1*2*5#
12GB ₦5,000 -*777*1*1*2*6#
24GB ₦8,000 -*777*1*1*2*7#
Dial *777# for more plans.

Note;The above data plan works on each and every device,be it android, symbian,bb,PC etc
- They are all valid for 30days.
- Auto renewal are applied

See the full details here http://www.saaltechs.com/2016/05/2016-mtn-glo-etisalat-zain-data-plans-that-woeks-on-every-device.html?m=0

You are welcome bro