Call block memory full - Cell Phones

You must be using a very old phone?? I have never known a mobile device to need memory to make or receive a call?! The phones transmitter relay relies on power not memory.

In some rare cases especially on old phones. Call logs can stop incoming and outgoing calls if the limit has been reached. Most old phones could only have around 100 calls listed in the call history. Despite the fact it could handle far more the limit set in the phones firmware is what actually blocks the calls. If this is the case. Simply go to settings. Calls. Find your call log or history. And delete everything. Dialled numbers will also be deleted but your contacts will stay in tact.

Hopefully this is of some help to you

What phone you used. you used android mobile clear the call history.