Here is a new way or trick of unblocking sim from our friend in a symbian forum, this is very hand because buying sim everytime you are blocked will be costly and beats the purpose of having lower cost on your internet bills.
When your simcard is blocked, you will not have 4G signals, you can easily see it on S22 and 931 modems, the signal led indicator will be color red, instead of the blue color. when your blocked from 4g signal of smart, then you wont be avail to connect and your load will be forfeited, well not until you do this unblocking trick for your smartbro kickstart simcard.
First is to set your signal into 2G, if your using a modem, set your modem to recieve 2G signal only
or if your are using smart phones like iphones and androids, set your signal to GPRS/2G only
better yet, insert the blocked sim on some old touch phones.
Second step is texting some keywords to a set of smart numbers, remember to ignore any replies from smart, or any errors like sending failed, etc...
Third is of course the keywords, text GPRS ON to 211, then text 3G ON to 211, also text POWERAPP to 5555 or 7577, after that text SET to 211, then reboot your unit, modem, or handset. let it sit for a while, then then after 5mins or so, try to set your signal to 4G, congrats, your smart kick start sim is now unblocked, you can now continue using your remaining time on your UNLISURF PROMO from Smart.