Dropped calls No Network service Network unavailable SIM card failed to register

the phone maybe locked to another carrier and is not registering the SIM on the network. Just because it is a GSM phone (SIM) card doesnt mean that it will work on any GSM phone. GSM carriers in USA are TMO, ATT and prepaid resellers.

If you're not registered with a service provider they will block you as soon as they recognize the sim card. Sometimes it takes a little longer than others. It may be that the vodacom sim came with the tablet and had a trial period. One that 'trial' period expired the block it.

First Option:
Phone in the Other Sim and check the Phone Network Signal If Network Signal Problem not Solved So
Secend Option:
Your Phone Network IC Fault So Please change Network IC
And Network Signal Problem will Solved
if it is there isn't much you can do on this side of the network.
Contact your phone company.

Hi,the message that pops up saying "Network Service Unavailable" might be from the message settings not correctly set and it is unable to send messages.

You can go to the message setting options on the cell phone to confirm if it is rightly set.

To be sure, you can also use the sim card on another phone to confirm, by using the a friends phone to send a message.

If the message settings are correctly placed, the problem might be from the sim card. You willneed to contact Sim service center for help to rectify the problem for the Sim card..

Take care...

this is most common when your phone is a branded phone that has been unlocked(branded being it was made to work with a particular network but was unlocked and can now partially work with other networks). in this case, the phone may find it difficult to recognize your sim card, the way the phone is made is in such a way that when a sim card of the network it is branded to is inserted, it would register it straight away but in a situation where it does not recognize the sim card, it is unable to register it. this brings about the sim registration failed.
sometimes you may lose service on your phone too depending on the level on your sim card.
if it happens that the mobile phone was not branded to any network before, then you have to change your sim card to a more developed one(maybe you get a replacement from your network provider because they produce sim cards differently.like the previous ones may not have some features or have a high level of attention and therefore needs to be changed with a more recent one)
hope this helped you? please rate

Hi, if the phone was registered then you can call your service provider and that will block the phone and it wont be able to be unblocked, if how ever you didnt register the phone with your service provider then all you can do is block the sim card by calling your service provider.
blocking the sim card will stop them accessing your data that is stored onto the sim card.

now the only other way you can block it without having it registered is by having the phones imei number, now the only chance you have of getting this number is if you either registered the phone or if you have still got the box the phone came in as the phones imei number will be printed on a sticker on the box.

failing that all you can do is block the sim card,

call your service provider and see what they can do, if the sim card is still in the phone then they may be able to lock the phone using the sim, they can do this but it all depends on what network you was with, give the police a call as they can block it via imei number if you do have the number or if you dont the best bet would be to call service provider and get the sim card blocked.

let me know how you get on or if you need further assistance ok

please rate this solution as i have a whole page of unrated posts, thanks

You need to call your service provider and give them the sim card serial number that way the sim card can be activated.

You SIM card is inactive. You have to make at least 1 paid call every 6 months otherwise your sim is deactivated. If it's new sim has to be activated.
Rate me if helped.Thanks.

the phone would need to be a tri or quad band phone the network may not be supported on those clone phones.

just change ur sim to some other (ur friends\ relation) mobile and check it, same probs happened, confirm ur network people and change ur sim card.