if you are using a dongle like azsky products,then you might consider these useful,
MTN: Use mtn true talk, or MTN and you shall receive for 7days upon loading a recharge card of just #100.( to mtn pulse by dialing *406# and tomigrate to mtn true talk dial *380#.
Airtel Nigeria: For dongles migrate to either airtel club ten or airtel club ten padi and you will receive 10mb valid for 7days upon recharge of #200 worth or airtime (tomigrate to club ten dial *101# while to migrate to club ten padi, dial *166#
if you are not using dongle, please buy a data bundle not a blackberry bundle.
Nigeria: First migrate to easy cliq by dialing *244# and you will receive 15mb of data every 7 days. SEE MORE AFTER CUT>>>>
: If you are using dongles and you want to reduce cost with your glo, simply migrate to glo g-bam Hi 5ive and receive 5mb daily after an access fee of #5 daily has been deducted.
To migrate to go gbam dial *100*5*1#.
Your airtime will remain untouched until either you use up the free mb, or your seven days validity expires.